Casper Ruud continued his excellent winning streak while Stefanos Tsitsipas made it a birthday to remember at the National Bank Open in Toronto.

Tsitsipas turned 23 on Thursday and marked the occasion with a 6-3 6-2 win over Karen Khachanov.

The Greek star was presented with a cake by tournament officials after his win, as the crowd serenaded him with a chant of 'happy birthday'.

It marks a significant improvement on when Tsitsipas turned 20. On that occasion, he lost the 2018 final of this event to Rafael Nadal.

Next up for Tsitsipas is Casper Ruud, who poked fun at his critics after he eased into the quarter-finals.

Ruud, the world number 12, won three titles on clay courts in July and has now continued that form in the ATP Masters 1000 event.

Playing on a hard court has proved no challenge for the in-form Norwegian, who wrote 'Hard Courts' with a smile underneath on the camera after his 6-4 6-3 victory over Dusan Lajovic on Thursday.

"I have seen a lot of people questioning my ability to play on hard court, so I just thought it was funny to write a little note," Ruud said in a news conference.

"I think it's fun to play on hard courts. Even though I (have achieved) most of my best results on clay, my best slam result is from this year’s Australian Open (where he reached the Round of 16), so I think it's a surface that also can suit my game well even though this year has been mainly clay.

“I think I'm motivated to come back to the hard courts. I have had two very good matches here. It's a great start for me to the hard-court swing."

Ruud, in the hunt for his fifth title of 2021, has won the only previous meeting between the duo.

"[I am] looking forward to that battle," Tsitsipas said. "We have played each other in the past. Not an easy guy to play against. Looking for a change, looking for a switch-up this time."

However, there was no place in the last eight for world number seven - and Olympic gold medallist - Andrey Rublev, who went down 7-5 7-6 (7-5) to American John Isner.

Fresh from a triumph in Atlanta, 36-year-old Isner has looked sharp all week and has now won eight successive matches.

It brings up a third quarter-final appearance for the world number 30 in Canada, and he will play French 11th seed Gael Monfils after he got past lucky loser Francis Tiafoe 6-1 7-6 (7-2). Monfils will be competing in his first ATP Tour quarter-final in 18 months.

Top seed Daniil Medvedev proved too good for Australian qualifier James Duckworth, winning 6-2 6-4 in one hour and eight minutes.

Medvedev was in ominous form on the hard court, sending down 10-1 aces and winning 27 of 32 points on his first serve.

The Russian world number two will play seventh seed Hubert Hurkacz who fought back to win 6-7 (7-9) 6-4 6-4 over Nicolas Basilashvili.

Eighth seed Diego Schwartzman lost in three sets to 10th seed Roberto Bautista Agut after the Spaniard saved three match points.

Bautista Agut will next play Reilly Opelka who came from behind, and also saved a match point, to win over Lloyd Harris in three.

Daniil Medvedev and Stefanos Tsitsipas survived three-set scares at the National Bank Open on Tuesday, but five-time tournament champion Rafael Nadal departed Toronto without even taking the court. 

Top seed Medvedev, who won just three games against Nadal in the final in 2019, the last time the tournament was played, prevailed 4-6 6-3 6-4 in his opener against Alexander Bublik.

The man Nadal beat to win the title the previous year, Tsitsipas, failed to convert on five match points in an epic second-set tiebreak but recovered to down Ugo Humbert 6-3 6-7 (13-15) 6-1.

Nadal pulled out ahead of a scheduled match against Lloyd Harris, who beat him last week in Washington as the 20-time grand slam winner struggled with a foot injury. 

Countryman Feliciano Lopez replaces Nadal in the draw and will face Harris on Wednesday. 

Elsewhere Tuesday, sixth seed Casper Ruud needed more than two hours to put away Marin Cilic 6-3 3-6 6-3, while 14th seed Grigor Dimitrov suffered a quick 6-3 6-4 exit against big-serving American Reilly Opelka.

A pair of unseeded veterans advanced, with 2016 finalist Kei Nishikori a 6-4 6-7 (5-7) 6-2 winner over Miomir Kecmanovic and John Isner defeating Alejandro Davidovich Fokini 6-4 6-1 in just over an hour.

Two days after appearing in his first ATP Tour final at the Citi Open, Mackenzie McDonald fell 6-3 6-4 to Benoit Paire in his Toronto opener. 

In other first-round matches, Karen Khachanov beat Cameron Norrie 6-4 5-7 6-4, Frances Tiafoe downed Yoshihito Nishioka 6-4 6-3, Dusan Lajovic handled Emil Ruusuvuori 3-6 6-3 6-3 and Nikoloz Basilashvili defeated Jenson Brooksby 2-6 6-0 6-4.

Novak Djokovic cruised through to the men's singles semi-finals after a commanding straight-sets victory over Kei Nishikori at the Ariake Tennis Park.

The world number one is yet to drop a set at the Tokyo Games after running out a 6-2 6-0 winner against home favourite Nishikori, who claimed bronze in Rio five years ago.

Having already won the Australian Open, French Open and Wimbledon this year, Djokovic is aiming to become the first male player of the Open era to complete the Golden Grand Slam.

Should he claim gold in Tokyo and go on to triumph at the US Open, he would become only the second player overall to achieve the feat, after Steffi Graf in 1988.

However, the Serbian has never reached an Olympic final – his best result coming in for the form of a bronze medal in Beijing.

"Matches are not getting easier, but my level of tennis is getting better and better," Djokovic told reporters after setting up a last-four tie with Alexander Zverev.

"I've done that many, many times in my career. I know that I'm the kind of player that the further the tournament goes, the better I'm feeling on the court.

"That's the case here, [it was] my best performance of the tournament tonight against a very good opponent."

DANIIL DUMPED OUT

Standing in the way of Djokovic and a shot at the gold medal is fourth seed Zverev.

The big-serving German saw off Jeremy Chardy 6-4 6-1 and like Djokovic is yet to drop a set at the tournament.

World number five Zverev, who hit 11 aces during the contest, broke early on the way to edging a closely fought opening set. The US Open finalist then went into overdrive with three breaks on the way to sealing the deal.

There was, however, no joy for second seed Daniil Medvedev, as he went down 2-6 6-7 (5-7) against Spain's Pablo Carreno Busta, who is looking to replicated Rafael Nadal's effort from 2008.

"Today, he could win a Masters easily, and yet he's never been in any final of those," the Russian said of his opponent.

"With the level he showed here today, he can get to the final of a Grand Slam easily. I couldn't play better than what I did today. It was not easy to play and I'm really disappointed with myself and for my country to lose in the quarters."

FROM RUSSIA WITH LOVE

Despite Medvedev's exit, Russia – or, at least, the Russian Olympic Committee – will be represented in the semi-finals by Karen Khachanov.

A quarter-finalist at Wimbledon earlier this month, the 12th seed built on his momentum by overcoming Ugo Humbert in three sets.

Khachanov took the opener on a tie-break but was pegged back by the Frenchman in the second as the contest went to a decider.

But he established early control by breaking to love in game four before holding out to prevail 7-6 (7-4) 4-6 6-3.

Novak Djokovic has welcomed the International Tennis Federation's (ITF) decision to delay the start of matches until 3:00pm (local time) at the Tokyo Olympics on Thursday.

The world number one has cruised through to the quarter-finals, where he will meet home favourite Kei Nishikori, but he – along with many others – had complained of heat and humidity causing problems due to contests starting too early.

That decision has come after world number two Daniil Medvedev struggled with conditions as he was forced to use two medical timeouts on Wednesday to cope with the heat and subsequently asked chair umpire Carlos Ramos, per ESPN, "If I die, are you going to be responsible?"

The pushback now means the majority of the games in the closing stages will be played in slightly cooler conditions in order to protect player welfare amid growing health concerns.

Speaking after a 6-3 6-4 mixed doubles win with Nina Stojanovic against Brazil's Luisa Stefani and Marcelo Melo, the Serbian expressed gratitude for the ITF's decision, though he felt it should have come earlier.

"It was nice news to receive," Djokovic said. "It's better than starting at 11:00am. It's not just in my opinion. I've spoken to six out of eight quarter-finalists in men's singles and everyone is in favour of starting later because the conditions are really brutal.

"It's very good [news] because you don't want to see situations like what we saw today with Paula Badosa [who retired after the first set].

"I've played tennis now professionally for 20 years, and I've never faced these kind of conditions in my entire life on a consecutive daily basis.

"I did experience certain similar days, one day in Miami or New York, or sometimes it happens here and there, but it's one or two days, and then it passes. Here is every single day. So, it's really draining players' energy, and you just don't feel yourself."

After gymnast Simone Biles' withdrawal to protect her mental health, Djokovic outlined the pressures that come with professional sport, too.

"Pressure is a privilege, my friend. Without pressure, there is no professional sport," he continued.

"If you are aiming to be at the top of the game, you better start learning how to deal with pressure and how to cope with those moments on the court, but also off the court.

"I've developed the mechanism on how to deal with it in such a way that it will not pose a distraction to me. It will not wear me down. I feel I have enough experience to know myself how to step on the court and play my best tennis.”

Djokovic, who was unsure if he had ever played in an "official" mixed doubles competition, and Stojanovic will now face Germany's Laura Siegemund and Kevin Krawietz in the quarter-final.

Despite limited experience, the six-time Wimbledon winner enjoyed the outing and was surprised how quickly he and Stojanovic understood each other's games.

"We did not chat about the tactics too much," the 34-year-old added. "We know each other, but we've never really played in the opposite ends of the net, or the same side of the net, so it was amazing how well we clicked from the beginning."

Daniil Medvedev did not take kindly to a question over the controversy surrounding Russian athletes at the Tokyo Olympics after he battled through sweltering conditions to reach the quarter-finals.

Medvedev beat Italy's Fabio Fognini 6-2 3-6 6-2 on Wednesday in a match that was paused for 10 minutes due to on-court temperatures reaching 31 degrees Celsius, with humidity then adding to that.

The world number two had to receive medical attention on two occasions before he prevailed to tee up a last-eight tie with Pablo Carreno Busta of Spain.

Top seed Novak Djokovic continued his march towards the medal matches with a routine win over Alejandro Davidovich Fokina, though in the doubles, Andy Murray's hopes of winning a historic fourth Olympic prize were shattered.

MEDVDEV'S TEMPER FRAYS IN THE HEAT

It had already been a stressful day for Medvedev. The 25-year-old replied "I can finish the match but I can die. If I die, are you going to be responsible?" when asked by chair umpire Carlos Ramos whether he could carry on playing against Fognini following two medical timeouts. 

Medvedev's temper then boiled over in the media mixed zone when he was questioned over the contentious nature of Russian athletes competing at the Games.

The Russian flag is not represented in Tokyo due to sanctions against the country for state-sponsored doping offences. Russia is suspended from competing in global sporting events for two years – a ban that was reduced from an initial four-year punishment. Instead, athletes are competing under the banner of the Russian Olympic Committee (ROC).

Medvedev was asked if he feels the Russian athletes are "carrying a stigma of cheaters".

Seemingly misunderstanding the question, Medvedev hardly held back in his reaction, saying: "That's the first time in my life I’m not gonna answer a question, man. And you should be embarrassed of yourself."

Before leaving the room, Medvedev subsequently told the press officer: "I think you should [remove] him from either the Olympic Games, either the tennis tournament. I don't wanna see him again in my interviews. Thanks."

MURRAY'S PARIS PARTICIPATION IN DOUBT

There was to be no fairytale title tilt for former world number one Murray. He won gold in the singles in London and Rio, and also managed a silver medal at the 2012 Games in the mixed doubles, but he and Joe Sailsbury suffered a defeat to Croatian pair Marin Cilic and Ivan Dodig in the quarter-finals.

The British pair won the first set but failed to make their advantage count, with Croatia's duo coming back to win 4-6 7-6 (7-2) 10-7.

Murray will be 37 by the time the Paris Games come around, and as he continues to carefully manage his return from hip surgery, the Scot could well have made his Olympic farewell.

"I don't know. I don't know if I'll get the opportunity to play [in the Olympics] again," he conceded.

"I love every minute of playing the Olympics. I wish that today would have gone differently. I had another chance with Joe to win a medal. We were so close and that is just disappointing. There was some stuff I wish I could have done at the end of the match to try and help out more. But yeah, very disappointing."

MIXED BAG FOR TSITSIPAS

While Medvedev, Djokovic and Alexander Zverev all progressed into the last eight in the singles, there was no place for Stefanos Tsitsipas, whose hopes were ended by Ugo Humbert.

The Greek world number four suffered a seemingly innocuous leg injury in the second set tie-break and failed to recover in the decider as Frenchman Humbert claimed the biggest win of his career.

However, Tsitsipas was swiftly back on court to play in the mixed doubles alongside partner Maria Sakkari, and the duo claimed a comfortable 6-3 6-4 victory over Canada's Gabriela Dabrowski and Felix Auger-Aliassime.

Asked after that win to discuss what went wrong in his earlier defeat, Tsitsipas replied: "I figured out a few things later during the match, like really, really late. 

"I think if I've had the same mindset or the same attitude, same vision that I had towards the very end of the match, I think things would have gone much, much smoother and better for me. It's something that I learned."

He also confirmed his injury was "nothing serious."

DJOKOVIC ON A ROLL

As expected, Djokovic is one win away from a shot at a medal in the singles, and he then followed up his victory over Davidovich Fokina by combining with Nina Stojanovic in the mixed doubles.

The Serbian pair beat Marcelo Melo and Luisa Stefani of Brazil 6-3 6-4 in just 70 minutes to book their place in the next round.

Djokovic will have the host nation against him in his next match, however, as he takes on Kei Nishikori, who is Japan's only hope of a singles medal after Naomi Osaka's exit.

The International Tennis Federation (ITF) has confirmed matches at the Tokyo Olympics will now start later in the day after concerns over player health and welfare.

World numbers one and two Novak Djokovic and Daniil Medvedev have been among the players to complain about games starting too early in the day, citing the heat and humidity at Ariake Tennis Park as a major issue.

Indeed, on Wednesday, 25-year-old Medvedev struggled with the conditions as he battled to a 6-2 3-6 6-2 win over Fabio Fognini.

Despite being allowed 10 minutes off court at one stage, Medvedev was in visible discomfort during the last-16 tie, and had two medical timeouts before being asked by chair umpire Carlos Ramos whether he could continue.

"I can finish the match but I can die," the Russian replied to Ramos, per ESPN. "If I die, are you going to be responsible?"

The 72 per cent humidity meant 31 degrees Celsius felt like 37 degrees Celsius on the heat index. Medvedev was not the only player to suffer on Wednesday, with Paula Badosa having to be taken from the court in a wheelchair as she retired against Marketa Vondrousova due to heatstroke.

Earlier in the week, Medvedev had questioned the approach of starting matches in the late morning, while top seed Djokovic suggested scheduling the first games for 15:00 local time.

The ITF has now agreed, with start times pushed back to 15:00, meaning the majority of matches in the closing stages of the Olympic tennis will be played during the slightly cooler evening hours.

"In the interests of player health and welfare and following extensive consultation, the ITF has announced a change of schedule due to the increasing heat and humidity currently being experienced in Tokyo," an ITF statement read.

"The decision to start matches at 3pm JST from Thursday is possible due to the outcomes of today’s matches across the five competitons being staged and the size of the player field.

"[The decision] is designed to further safeguard player health."

World number one Novak Djokovic made light work of Jan-Lennard Struff to continue his progress at the Olympic Games, and he revealed he is thriving off the energy in Tokyo as he copes with the weight of expectation.

Djokovic is aiming to complete a Golden Slam this year, having already swept up the Australian Open, French Open and Wimbledon titles.

Olympic gold is next on his list, before the Serbian will head to the US Open.

Struff was no match for the 34-year-old on Monday, as he teed up a round-of-16 tie with Alejandro Davidovich Fokina by beating the German 6-4 6-3.

Djokovic will be joined by fellow favourites Alexander Zverev and Daniil Medvedev, as the singles competition begins to hot up.

DJOKOVIC THRIVING IN TOKYO

Djokovic is aiming to become the first man in the Open Era to complete a Golden Slam, though even if he did not have such a feat in his sights, he would still have the expectation of clinching gold, given Roger Federer and Rafael Nadal chose not to compete.

"I think that once you reach the top spots of the rankings and start winning slams, you're going to experience different kinds of expectations and pressure from yourself and from people around," Djokovic said.

"It's kind of a normal thing that a lot of athletes from our sport have been experiencing in the past and it's going to happen in the future."

The 20-time grand slam champion also revealed he is splitting his time between a hotel and the Olympic athletes' village, as he looks to soak up the atmosphere in Tokyo, despite the ongoing coronavirus restrictions.

"I only stayed in the Olympic village the first few days in Rio, then I moved when the competition started to the hotel," he explained.

"Here, I'm between the hotel and the village but I'm spending every single day in the village mostly and the hotel is mostly for sleeping over, basically, and having my own routine in the morning.

"Other than that, I'm always in the village because it's just so special. Most of the tournaments I'm in a hotel anyway and this [Olympic Games] happens once in four years. Of course, I try to balance things out with keeping my own routines and things that make me feel good, but I'm thriving also on that wonderful energy in the village."

SPIDERCAM FACES ZVEREV'S WRATH

Alexander Zverev moved confidently into the round of 16, defeating Colombia's Daniel Elahi Galan Riveros 6-2 6-2 in just 71 minutes.

In fact, his greatest nemesis was the spidercam, which came a little too close for the German's comfort.

Zverev clipped a ball at the camera suspended above his head as he prepared to serve – the world number five claiming he almost hit the wire holding the device in place when he threw the ball.

"It was three meters above me, I almost hit the wire rope when I was throwing the ball. It just hung too low," he said, though the chair umpire disagreed.

There was ultimately no negative impact on Zverev's performance, and the 24-year-old will face Georgia's Nikoloz Basilashvili for a place in the last eight.

Basilashvili got the better of Italian world number 26 Lorenzo Sonego 6-4 3-6 6-4 to secure his progression.

MEDVEDEV MAKES HIS CLASS COUNT

The gulf in quality between Daniil Medvedev and Sumit Nagal of India was clear to see, as the world number two – who is representing the Russian Olympic Committee – cruised through in just 66 minutes.

Nagal, ranked 160th in the world, dropped serve in the first game of the match and never looked likely to recover, and the Australian Open runner-up breezed into the next round 6-2 6-1.

Medvedev will next go up against Italy's Fabio Fognini. The Russian has faced the world number 31 on four occasions, winning three times.

MURRAY (NO, NOT THAT ONE) DROPS OUT

Great Britain's Olympic team had a day to remember on Monday, but Jamie Murray and his doubles partner Neal Skupski could not carry on their run.

Kei Nishikori and Ben McLachlan, representing hosts Japan, got the better of the British duo 6-3 6-4.

Murray – whose brother Andy is also competing in the doubles but has withdrawn from the singles, in which he was defending champion – was called up as a late replacement for Dan Evans.

He has not made it past the second round in four Olympic Games, despite having won seven grand slam doubles titles.

Daniil Medvedev once again came up short in five sets at Wimbledon as he was defeated by Hubert Hurkacz in their delayed fourth-round match.

World number two Medvedev had reached the quarter-finals in three of his previous four majors – after making the last eight in only one of the prior 13 – but the grass-court grand slam continues to provide him with some difficulties.

The Russian's run to round four was his best ever at the All England Club, having bowed out a stage earlier in each of his three previous main-draw appearances.

But Medvedev's campaign ended in the same fashion as each of those, again losing in five sets. He had appeared to overcome that hoodoo in round three this year when he rallied from two sets down against Marin Cilic.

This reverse was stretched over two days, with Medvedev leading 6-2 6-7 (2-7) 6-3 3-4 when rain intervened on Court Two on Monday.

Medvedev and Hurkacz headed to Centre Court to complete the job first thing on Tuesday, but the second seed could not complete the job.

The Polish challenger broke instantly and then served out the second set, teeing up a decider and bringing back bad memories for Medvedev.

A shabby display from the two-time major finalist then put paid to his hopes of a recovery, the fifth set featuring 12 unforced errors to Hurkacz's one.

Indeed, Medvedev failed to apply any sort of pressure, winning only four receiving points and failing to forge a break point opportunity. Hurkacz created and took two, triumphing 2-6 7-6 (7-2) 3-6 6-3 6-3.

As Hurkacz looks ahead to a first grand slam quarter-final against Federer, Medvedev will rue a missed opportunity.

He could have finished this championship as the world's number one had he claimed silverware or faced anyone other than the top-ranked Novak Djokovic in the final.

"I played really bad today. There's not much more to say," acknowledged Medvedev.

Daniil Medvedev vowed not to let his fifth-set lead slip after a stunning Wimbledon comeback against Marin Cilic – even though he admitted he was "basically destroyed" in the first two sets on Saturday.

Cilic, the runner-up at the 2017 championships, was two sets to the good in the third-round match on Court 1 against the second seed.

Yet Medvedev, who won his first Tour title on grass in Mallorca this year, responded in style to win a grand-slam match after losing the opening two sets for the first time.

The Russian triumphed 6-7 (3-7) 3-6 6-3 6-3 6-2 to stretch his grass-court winning streak to seven matches and reach Wimbledon's second week for the first time in his career.

Medvedev took David Goffin to five sets at this tournament two years ago only to suffer defeat, and he was worried such a scenario could repeat itself when his 5-0 lead in the decider quickly became 5-2.

"It was an unbelievable match," he said on court. "I think tennis fans always enjoy watching players come back from two-sets-to-love down and for it to be five sets. I certainly do so when I watch tennis on the TV.

"It's my first comeback [from two sets down], and actually what's amazing is against David Goffin at Wimbledon in 2019, I was two-sets-to-love down and I had a break in the fifth set, but I lost. So when I left the court after the fourth set today, I told myself, 'It's not going to be another one of those'.

"So I'm really happy. When I was 5-0, 40-0 up at the end and Marin came back to 2-5, I thought to myself, 'Again!' Marin is an amazing player and for the first two sets he basically destroyed me."

Medvedev joined compatriots Andrey Rublev and Karen Khachanov in the second week, making this the first year in which three Russian men have reached this stage at Wimbledon in the Open Era.

Medvedev will face 14th seed Hubert Hurkacz next and could meet Roger Federer in the quarter-finals.

After an enforced hiatus in 2020 due to the coronavirus pandemic, tennis returns to SW19.

Novak Djokovic makes his way back to Wimbledon as the defending champion and with the men's grand slam record firmly in his sight.

Djokovic conquered Rafael Nadal en route to French Open glory and his 19th slam crown – one shy of the record shared by rivals Nadal and Roger Federer.

With Nadal and Dominic Thiem absent, Djokovic's path to a 20th major trophy has opened up in London.

The women's title is up for grabs after holder Simona Halep withdrew, and Serena Williams can still dream of making history.

As all eyes shift to the All England Club, Stats Perform looks at the numbers behind this year's slam, using Opta data.

Dominant Djokovic

World number one and top seed Djokovic begins his title defence against promising Briton Jack Draper in the first round.

French Open champion Djokovic has won four of the last six Wimbledon tournaments, including each of the past two – the last player to win more at Wimbledon in a row was Federer between 2003 and 2007 (five).

A five-time Wimbledon winner, Djokovic is the only man to have won the first two grand slam tournaments of a calendar year over the last 25 years, doing it in 2016 and 2021. The last man to win the first three grand slams of a calendar year was Rod Laver during his Grand Slam in 1969.

The 2019 Wimbledon final was the first slam decider to be decided by a final set tie-break, with Djokovic beating Federer 7-3 in that tiebreak, while it was also the longest final in Wimbledon history (four hours, 57 minutes).

No man has won Roland Garros and Wimbledon in the same year since Nadal in 2010.

Federer farewell?

The curtain appears to be closing on all-time great Federer, who withdrew from the French Open after a draining four-set win over Dominik Koepfer to preserve his body for the grass season.

This year's Wimbledon could be the 39-year-old's final realistic shot at a grand slam as Djokovic bids to become the greatest of all.

Seeded sixth, Federer – who meets Adrian Mannarino first up – has won the most Wimbledon titles among all male players in the slam's history.

Federer will aim to win his 21st grand slam, which would break a tie with Nadal for the outright men's record.

The 'Big Four' and their stranglehold

Injuries have forced two-time Wimbledon champion Andy Murray to fall out of the equation but there has been no getting past the original 'Big Four'.

Among the men, the last 17 years of Wimbledon has been dominated by the same four players – Federer (eight titles), Djokovic (five), Nadal (two), Murray (two). The last winner at Wimbledon before them was Lleyton Hewitt in 2002.

Since Wimbledon in 2004, only one of the 68 slams has not seen at least one of Federer, Djokovic and Nadal in the semi-finals – it was at the US Open last year.

The new generation is headlined by grand slam runners-up Daniil Medvedev and Stefanos Tsitsipas.

Medvedev has never passed the third round at Wimbledon, though his two defeats at that stage have both been in five sets. The Russian second seed has reached at least the quarter-finals in three of his last four major tournaments, after reaching that stage in only one of his previous 13.

Beaten by Djokovic in the Roland Garros final, Tsitsipas has reached the semi-finals in his last three slams, having done so only once in his previous 12. The third seed has never reached the quarter-finals at Wimbledon, however.

Wimbledon is the only slam where fourth seed Alexander Zverev is yet to reach the quarter-final, his best result being a fourth-round performance in 2017. Since the beginning of 2020, he has advanced to the semi-finals in three slam tournaments, after never doing it in his previous 18 such major main-draw appearances.

Serena's ongoing quest

The queen of WTA tennis for so long, Serena Williams is one slam success away from matching Margaret Court's record of 24 major singles championships. But the 39-year-old has been stuck on 23 since reigning supreme at the Australian Open in 2017.

Williams, who lost in the French Open fourth round, has won seven Wimbledon titles (level with Steffi Graf) – only Martina Navratilova has more in the Open Era (nine).

American superstar Williams has been a Wimbledon runner-up in 2018 and 2019. Chris Evert is the only player in the Open Era to have lost three consecutive Wimbledon finals (between 1978 and 1980).

Williams, the sixth seed who will clash with Aliaksandra Sasnovich in the opening round, is looking to become only the second woman to win 100 Wimbledon singles matches (currently 98), alongside Navratilova (120). She could also become the first woman to reach 100-plus wins in two different majors (106 wins at the US Open).

From the first Wimbledon final reached by one Williams sister in 2000 (won by Venus against Lindsay Davenport), only in four of 20 editions has neither of the two sisters reached the decider – in 2006 (Amelie Mauresmo-Justine Henin), 2011 (Petra Kvitova-Maria Sharapova), 2013 (Marion Bartoli-Sabine Lisicki) and 2014 (Kvitova-Eugenie Bouchard).

Barty party?

Former French Open champion Ash Barty heads to Wimbledon as the top seed and will kick off her title bid against veteran Carla Suarez Navarro.

However, world number one Barty has never reached the Wimbledon quarter-finals. Reaching the 2019 fourth round was her best result. The last Australian woman to reach the quarters at Wimbledon was Jelena Dokic in 2000.

The top seed in the Wimbledon women's singles main draw has been eliminated in the first round just three times in the Open Era – Graf in 1994, Martina Hingis in 1999 and Hingis again in 2001.

Wimbledon is the only major won by Kvitova in her career (2011 and 2014). She is one among the three current players with multiple titles at the All England Club, alongside Serena and Venus Williams.

Karolina Pliskova was the woman with the most aces per match made on average at Wimbledon 2019 (9.0, 36 in total) among players who reached the third round.

Daniil Medvedev made light work of sealing his first grass-court title, as he defeated Sam Querrey in straight sets at the Mallorca Championships.

The world number two was playing in his first final on grass, and took just 63 minutes to win 6-4 6-2 and warm up for Wimbledon in emphatic fashion.

It brings up Medvedev's second title of the season and his 11th in total, though he had failed to progress beyond the quarter-finals in his last five tournaments since winning in Marseille in March.

Medvedev suggested he was clicking into gear after his win over Pablo Carreno Busta on Friday, and he backed up his point on Saturday, cruising to victory without offering up a single break point.

The 25-year-old broke world number 60 Querrey – seeking his first ATP Tour title since 2017 – on three occasions, and an ace, his 10th of the match, sealed victory.

Like at the French Open, Medvedev heads to Wimbledon as the second seed. He is the same half of the draw as 20-time grand slam champion Roger Federer, and has a first-round encounter with Jan-Lennard Struff, who knocked the Russian out of the Halle Open last week.

Daniil Medvedev reached the first grass-court final of his career as he saw off Pablo Carreno Busta at the Mallorca Championships.

Medvedev, the top seed, had to come from a set down against his Spanish opponent, winning 3-6 6-3 6-2 to tee up a showdown against Sam Querrey.

The world number two has won 10 ATP Tour titles, but they have all come on hard courts.

"I know that I can play well on grass," said Medvedev, who followed up a quarter-final run at Roland Garros with a first-round defeat to Jan-Lennard Struff at the Halle Open.

"Unfortunately we don't have that many tournaments, only one ATP 500 and one grand slam. It's going to be a special feeling [if I] win my first title on grass.

"I still don't have one on clay, even if I have one final. Adding these titles, especially on different surfaces, can help your confidence and it’s just a great thing for your career."

World number 13 Carreno Busta had looked sharp in successive straight-set wins en route to the semi-finals, and started Friday's encounter in good form.

He had not dropped serve across the first four sets of his campaign in Mallorca and extended that streak by saving three break points in the opening set.

However, Medvedev – who has been drawn in the same half as Roger Federer at Wimbledon – rallied and served out the one-hour, 56-minute victory with an ace.

Querrey, meanwhile, will be going for his first ATP Tour title since 2017 after he cruised to a 6-4 6-3 win over unseeded Adrian Mannarino.

Another player who is hunting for his first Tour triumph on grass is Alex de Minaur, who defeated Soon Woo Kwon 6-3 7-6 (7-2) to progress to the Viking International final.

The world number 18 has won four hard-court titles and will go up against Lorenzo Sonego for the crown in Eastbourne.

Sonego beat De Minaur's compatriot Max Purcell 6-1 3-6 6-1. The Italian triumphed at the Sardegna Open in April.

Daniil Medvedev is set for just the third grass-court semi-final of his ATP Tour career at the Mallorca Championships.

Medvedev, who has reached two hard-court grand slam finals, as well as winning last year's ATP Finals, has never been beyond the last four on grass. He has only done so once on clay.

The Russian will get another chance on Friday, though, against Pablo Carreno Busta.

That is his reward for beating Casper Ruud, who Medvedev acknowledged likely also does not favour the grass season.

"I don't think grass is his best surface, but in the first set he was playing top level and I couldn't get any break points," Medvedev said after beating Ruud 7-5 6-1. 

"But as soon as he started serving a bit worse and making some errors, I tried to use it as fast as I could.

"It was important to win the first set and not in a tie-break, this gives me a boost of confidence."

Carreno Busta defeated Jordan Thompson in straight sets but was not followed into the semis by either of the other Spaniards in action.

Third seed Roberto Bautista Agut was toppled by Sam Querrey, as Feliciano Lopez lost to Adrian Mannarino.

At the Viking International in Eastbourne, there is an Australian in each semi-final after wins for Alex de Minaur and Max Purcell.

De Minaur wore down Vasek Pospisil 6-4 6-4 and now faces Kwon Soon-woo, who was similarly comfortable against Ilya Ivashka.

Purcell battled past Andreas Seppi, recovering from a tough second set in which he succumbed 6-1, but must now face another Italian.

Third seed Lorenzo Sonego secured his semis spot by blasting past Alexander Bublik 6-1 7-5.

Feliciano Lopez reached the milestone of 500 ATP Tour wins with a comeback victory over Karen Khachanov at the Mallorca Championships.

Lopez, who turns 40 in September, prevailed 4-6 6-2 6-4 against the sixth seed.

He is the 10th active player to reach 500 wins, after Roger Federer, Rafael Nadal, Novak Djokovic, Andy Murray, Richard Gasquet, Fernando Verdasco, Marin Cilic, Stan Wawrinka and Tommy Robredo.

"More than the 500 wins, the important thing to me is the chance to keep playing in these kinds of tournaments and to keep being competitive," Lopez told ATPTour.com.

"I didn’t expect to be able to play at the level I am on the ATP Tour at 40 years of age, which I will be in September."

Spanish veteran Lopez would have expected to be taking on Dominic Thiem next, but the world number five retired due to a wrist injury when 5-2 to the good in the opening set against Adrian Mannarino.

"It's nice for me to be in the quarter-finals, but winning this way is not so cool. I really like Dominic, he's such a nice guy and I hope he will be feeling better soon," Mannarino said. "I hope it is not so serious, especially right before Wimbledon."

Elsewhere on the Balearic island, top seed Daniil Medvedev breezed past Corentin Moutet 6-4 6-2, while Casper Ruud defeated Tennys Sandgren in straight sets.

At the Viking International in Eastbourne, there were mixed fortunes for Lopez's countrymen Alejandro Davidovich Fokina and Albert Ramos-Vinolas.

Fokina, seeded sixth, saw off Mikael Ymer 7-5 6-1, but number seven seed Ramos-Vinolas fell 6-4 6-3 to Emil Ruusuvuori.

Alexander Bublik defeated fellow Kazakh Mikhail Kukushkin is straight sets, while Jo-Wilfred Tsonga went down in similar fashion against Egor Gerasimov.

Fifth seed Casper Ruud secured his place in the last 16 of the Mallorca Championships with a straight sets win over Gilles Simon on Monday.

The 22-year-old claimed a 6-4 7-6 (7-4) victory to set up a meeting with Tennys Sandgren in the next round.

Following Ruud onto Centre Court, the American beat Spain's Jaume Munar 7-6 (7-3) 7-5 in just over two hours.

Sixth seed Karen Khachanov is also safely through, although he surrendered a set in beating French qualifier Lucas Pouille 7-6 (9-7) 3-6 6-4.

But Dusan Lajovic, seeded eighth, was not quite as fortunate.

Lajovic, ranked 41st in the world, was beaten 6-4 7-6 (7-2) by Slovakian qualifier Lukas Klein (ranked 256).

Feliciano Lopez came out on top of battle of Spaniards in the round of 32, beating Nicola Kuhn 6-1 7-6 (7-4).

Their compatriot Roberto Carballes Baena is in with a chance of joining them on Tuesday after seeing his clash with Sam Querrey paused due to light with both players having taken a set.

Elsewhere, Corentin Moutet beat Lloyd Harris to set up a meeting with top seed Daniil Medvedev, while Jiri Vesely and Stefano Travaglia also progressed.

Monday's other scheduled ATP event in Eastbourne saw play cancelled due to rain, with the scheduled match between Jo-Wilfried Tsonga and Egor Gerasimov pushed back as a result.