Stefanos Tsitsipas has slammed his father's coaching style after suffering a shock straight-sets defeat at the Canadian Open on Thursday.

The 25-year-old was beaten 6-4 6-4 by Kei Nishikori, the world number 576, as he secured the scalp of the tournament so far in Montreal.

It follows a disappointing Olympic Games for Tsitsipas, who was knocked out by eventual winner Novak Djokovic in the quarter-finals.

He also struggled at Wimbledon last month, suffering defeat to Emil Ruusuvuori in the second round.

Now, he has hit out at his coach and father, Apostolos Tsitsipas, who he asked to leave midway through Thursday's match, for seemingly not reaching the standards he is looking for.

"I need, and I deserve, a coach that listens to me and hears my feedback as a player," Tsitsipas said.

"My father hasn't been very smart or very good at handling those situations. It's not the first time he has done that. I'm really disappointed at him.

"I really don't know right now if I'd consider any changes, but I'm really disappointed.

"The most important thing for a player is to have direct and good feedback from a coach. The coach is not the one holding a racket. The player is the one trying to execute a game plan.

"It's a collaborative work that you put in together. It has to be reciprocal in order for me to try to develop my tennis. It's something I don't want to get stuck at that."

Daniil Medvedev suffered a rare hard-court loss to an opponent outside the world's top 20 as Alejandro Davidovich Fokina sent him crashing out of the Canadian Open in the last 32.

Third seed Medvedev was beaten 6-4 1-6 6-2 by world number 43 Davidovich Fokina, the Spaniard coming through a one-hour, 56-minute contest in Montreal.

Davidovich Fokina, who reached the semi-finals of the tournament in 2023, will now face either Karen Khachanov or Matteo Arnaldi for a place in the quarter-finals.

It was only Medvedev's third hard-court defeat to an opponent ranked outside the ATP's top 20 since the start of 2023, with the others both coming against Sebastian Korda.

Medvedev was not the only player to be on the receiving end of an upset on Thursday, as Japan's Kei Nishikori beat Stefanos Tsitsipas 6-4 6-4 for his first top-20 win since 2021.

However, things were far more comfortable for world number four Alexander Zverev, who crushed Jordan Thompson by a 6-1 6-1 scoreline to reach the third round.

Zverev won a huge 95% (18/19) of points behind his first serve, also slamming 20 winners past Thompson, who had previously led the duo's head-to-head series 2-1.

Novak Djokovic survived an injury scare to keep his hopes of landing an Olympic gold medal alive following a straight-sets victory over Stefanos Tsitsipas. 

Djokovic appeared to be struggling with a knee injury that forced him to withdraw from the recent French Open, but was able to emerge a 6-3 6-6 (7-3) victor. 

The Serbian started brightly on Court Philippe Chatrier, earning a break in the fourth game that proved decisive, with Djokovic able to hold serve to see out the first set. 

However, Tsitsipas raced out of the blocks in the second, producing a double break to race into a 4-0 lead. But the former world number one was not ready to concede.

With the Greek in touching distance from taking the encounter to a third-set decider, Djokovic rallied to win the next three games on the spin to level the game at 5-5. 

Djokovic and Tsitsipas would hold their respective serves, meaning a second-set tie-break would decide whether the encounter would enter a third set at Roland-Garros. 

But it would be the Serbian who would advance to the semi-finals, winning three games in a row to complete a brilliant display. 

Djokovic will face Lorenzo Musetti for a place in Sunday's final after the Italian defeated reigning champion Alexander Zverev in straight sets. 

Data Debrief: Djokovic continues his quest for gold

Djokovic has now made four singles semi-finals at the Olympics: twice as many than any other player since tennis returned to the Summer Olympics program in 1988.

The Serbian impressed on serve, scoring six aces throughout the contest to Tsitsipas' three, while saving four of the six break points he faced. 

Novak Djokovic survived an injury scare to keep his hopes of landing an Olympic gold medal alive following a straight-sets victory over Stefanos Tsitsipas. 

Djokovic appeared to be struggling with a knee injury that forced him to withdraw from the recent French Open, but was able to emerge a 6-3 6-6 (7-3) victor. 

The Serbian started brightly on Court Philippe Chatrier, earning a break in the fourth game that proved decisive, with Djokovic able to hold serve to see out the first set. 

However, Tsitsipas raced out of the blocks in the second, producing a double break to race into a 4-0 lead. But the former world number one was not ready to concede.

With the Greek in touching distance from taking the encounter to a third-set decider, Djokovic rallied to win the next three games on the spin to level the game at 5-5. 

Djokovic and Tsitsipas would hold their respective serves, meaning a second-set tie-break would determine whether the encounter would continue at Roland-Garros. 

But it would be the Serbian who would advance to the semi-finals, winning three games in a row to complete a brilliant display. 

Djokovic will face Lorenzo Musetti for a place in Sunday's final after the Italian defeated reigning champion Alexander Zverev in straight sets. 

Data Debrief: Djokovic continues his quest for gold

Djokovic has now made four Singles semi-finals at the Olympics: twice as many than any other player since tennis returned to the Summer Olympics program in 1988.

The Serbian impressed on serve, scoring six aces throughout the contest to Tsitsipas' three, while saving four of the six break points he faced. 

Novak Djokovic is into the last eight at the Paris Olympics after he cruised past Dominik Koepfer in straight sets.

Djokovic triumphed 7-5 6-3 in one hour and 37 minutes at Roland-Garros on Wednesday.

The world number two is in the hunt for a second Olympic medal, having previously claimed bronze in 2008.

Stefanos Tsitsipas, who beat Sebastian Baez, is next up for Djokovic.

The 37-year-old, now into his fourth Olympic quarter-final, has defeated the Greek in each of their last 10 meetings.

"It’s very humid," said Djokovic after his win, with Paris experiencing sweltering conditions.

"I just hope it rains so it cools down the temperature and the air a bit. But you have to accept and embrace the conditions. It's the same for you and your opponent, so you have to make the best out of it."

Lorenzo Musetti, meanwhile, defeated Taylor Fritz, though the latter's compatriot Tommy Paul did beat home hope Corentin Moutet.

Data Debrief: Golden oldie

At the age of 37 years and 61 days, Djokovic is the oldest player to reach the men's Singles quarter-finals at the Olympics since tennis returned to the program in 1988.

Italian Musetti has equalled the best run by a man from his nation in the Olympics singles since 1988 (Paolo Cane in Seoul 1988 and Renzo Furlan in Atlanta 1996).

Matteo Berrettini is through to his third Swiss Open final following an impressive straight-sets victory over Stefanos Tsitsipas.

The 2018 champion - and 2022 runner-up - prevailed 7-6 (8-6) 7-5 after one hour and 42 minutes to set up a championship showdown with Quentin Halys in Gstaad.

Berrettini had lost all five of his previous meetings with top seed Tsitsipas, but dropped just one point on serve during the opening set, which he eventually snatched in a tie-break.

The Greek was seeking his third ATP final of the season on clay, having triumphed in Monte-Carlo and been runner-up to Casper Ruud in Barcelona.

However, he just could not shake off the Italian, who crucially broke in game 11 of the second set before holding for victory.

He will contest Sunday's championship match with Frenchman Halys, who saw off fifth seed Jan-Lennard Struff in straight sets.

Data Debrief: Big-serving Berrettini stuns Tsitsipas

The statistics certainly favoured Tsitsipas, who was 14-1 against Italian opponents on clay and 29-2 against players ranked outside the top 50 on surface since the start of the 2021 season.

However, Berrettini had other ideas. The former Wimbledon finalist, who was 1-6 against top-15 opponents on clay, won 92% of his first-serve points.

And while Tsitsipas double-faulted on four occasions, Berrettini stood firm and is now an impressive 12-1 in Gstaad.

Stefanos Tsitsipas will play Matteo Berrettini in the Swiss Open semi-finals, after seeing off Fabio Fognini in straight sets on Friday.

The two-time major finalist, who is making his first appearance in Gstaad, took 66 minutes to wrap up a 6-4 6-3 victory over the Italian on Roy Emerson Court.

Though he relinquished an early break in the opening set, Tsitsipas claimed a crucial one at 5-4 to edge his nose in front.

Despite seeing another early break cancelled out in the second set, the Greek managed to earn another, and eventually progressed to the last four in comfortable fashion.

"My returns worked pretty well, I was very consistent with them," he said. "I insisted on staying back throughout the match and giving it a bit of a loop, trying to get the angles from the very beginning. It worked pretty well.

"I'm happy with how I started serving towards the end of the match. In the beginning, I was still trying to figure out how I was going to open up the court and create opportunities on my serve. It took me a while to figure out. I unlocked the code towards the end."

Another Italian lies in wait for Tsitsipas in Berrettini, who overcame Felix Auger-Aliassime 7-6 (9-7) 7-6 (7-2).

The former Wimbledon finalist is seeking his second clay-court title of the season, having also triumphed in Marrakech, while he was runner-up to Jack Draper in Stuttgart last month.

Data Debrief: Another Italian Job well done by Tsitsipas

Reigning Monte-Carlo Masters champion Tsitsipas is through to his fourth ATP semi-final of the season, with three of those coming on clay, while recording his fifth straight victory in as many meetings with Fognini.

The Greek now boasts an impressive 14-1 record against Italian opponents on surface - his only such defeat coming against Jannik Sinner in Rome four years ago.

Hubert Hurkacz was the highest-profile casualty on day four of the Wimbledon men's singles, with the seventh seed forced to retire injured during his clash with Arthur Fils.

The Pole beat Roger Federer on the way to reaching the semi-finals in 2021, while he was runner-up to new world number one Jannik Sinner in Halle last month.

However, when trailing by two sets to one against his French opponent, Hurkacz sustained a knee injury during the tie-break in the fourth.

Despite valiantly attempting to battle on, he aggravated the problem further soon after when diving for a return, and was subsequently unable to continue with Fils advancing to round three.

There, he will play Alex de Minaur after the ninth seed enjoyed a straight-sets victory over Jaume Munar.

Fourth seed Alexander Zverev also prevailed in three sets as he continued his rich vein of form. The Italian Open champion, who was also runner-up to Carlos Alcaraz at Roland-Garros, was a commanding 6-1 6-2 6-4 winner over Marcos Giron. 

Next up for him is Cameron Norrie after the 2022 semi-finalist ousted compatriot Jack Draper in a battle of the Brits on No.1 Court.

Eastbourne champion Taylor Fritz overcame Arthur Rinderknech in four sets, as did 15th seed Holger Rune against Thiago Seyboth Wild.

Meanwhile, Grigor Dimitrov recovered from two sets down to beat Juncheng Shang in a decider. The 2014 semi-finalist will now play Gael Monfils, who completed a straight-sets victory over fellow veteran Stan Wawrinka.

Although, there was no joy for 11th seed Stefanos Tsitsipas. The two-time major finalist was beaten in four sets by world number 87 Emil Ruusuvuori.

Andrey Rublev suffered a shock early exit at Wimbledon on Tuesday as numerous other seeds progressed through to the second round.

Rublev, a 17-time ATP Tour champion, reached the quarter-finals at this tournament last year but failed to make it past his opener this time after Argentine Francisco Comesana upset the sixth seed.

Comesana triumphed 6-4 5-7 6-2 7-6 (7-5) on No.2 Court, where play was disrupted by heavy downpour, as Rublev became the highest-ranked male player to fall so far at the All England Club.

Unlike Rublev, fourth seed Alexander Zverev coasted past Roberto Carballes Baenai in straight sets on No. 1 Court.

"I want to compete, I want to do well here at Wimbledon. It's the most historic tennis tournament that we have," Zverev said after reaching the second round for the seventh time in eight attempts at this tournament.

"I've struggled over the years here on these beautiful courts, unfortunately, but I feel different this year."

Hubert Hurcakz progressed through his first challenge, though the seventh seed conceded the first set before defeating Radu Albot 5-7 6-4 6-3 6-4, smashing 24 aces in the process.

Alex de Minaur headed into this year's edition as the ninth favourite and his opening performance befitted that status, overcoming fellow Australian James Duckworth 7-6 (7-1) 7-6 (7-3) 7-6 (7-4).

Stefanos Tsitsipas fought off Taro Daniel with a 7-6 (7-5) 6-4 7-5 in just under two-and-a-half hours as the 11th seed aims to go further than his personal-best fourth-round appearances in 2018 and five years later.

It was not so straightforward for British number one Jack Draper, who secured a hard-fought 3-6 6-3 6-3 4-6 6-3 victory over Elias Ymer under the lights on Centre Court.

Draper is in fine form, having won the Stuttgart Open in June and defeating Carlos Alcaraz at the Queen's Club Championship, and will next meet fellow British player Cameron Norrie.

World number 42 Norrie had little trouble in his first-round test, dispatching Facundo Diaz Acosta in straight sets on No.3 Court.

Data Debrief: Comesana on cloud nine as Zverev powers through

Comesana may have expected to compete with Rublev in his first-round encounter, but this was only his second appearance on grass courts of his career at any level, professional or junior.

The world number 122 managed to battle to a hard-fought triumph after a clinical showing, converting four of five break points he earned.

Zverev had no such difficulty in progressing to the second round, powering 18 aces at an event he has never reached the quarter-finals in.

The German is now 12-2 for the year in major action, having reached the semi-finals at the Australian Open and the showpiece at the French Open before defeat to Alcaraz.

Alexander Zverev avoided a first-round upset at the Halle Open after battling past fellow German Oscar Otte on Tuesday.

The second seed managed to triumph in his first match since the French Open final defeat to Carlos Alcaraz, eventually winning 6-7 (5-7) 6-3 6-4.

Zverev has twice reached the show-piece at this event, in 2016 and 2017, though acknowledged challenges remain with adapting from the clay-court surfaces at Roland-Garros.

"A week ago, I was playing on clay still basically," Zverev said in his on-court interview. "He made it very tough for me, no rhythm at all.

"That's how grass-court tennis is sometimes and I'm just happy with the win.

"He did make it extremely difficult for me, so credit to him. I'm obviously happy that I won and hopefully, it's going to be a level above in the next match."

The world number four is now 35-10 for the season and will look to extend that record when he meets Italy's Lorenzo Sonego in the next round.

Zverev has won all three head-to-head meetings with Sonego, and will fancy his chances if he delivers another heavy-hitting performance next time out.

The 27-year-old smashed 54 winners, compared to his 40 unforced errors, to triumph in just over two hours under the OWL Arena roof.

Stefanos Tsitsipas also began his grass season with victory, defeating home hopeful Henri Squire 7-6 (9-7) 7-6 (7-2).

The Greek sixth seed will face Luciano Darderi or Jan-Lennard Struff in the second round.

Carlos Alcaraz continued his perfect start to the French Open, defeating Stefanos Tsitsipas in straight sets to reach the semi-finals on Tuesday.

It is the second year running that Alcaraz has brushed aside Tsitsipas in the quarter-finals, this time with a 6-3, 7-6 (7-3), 6-4 victory in just two hours and 15 minutes on Court Philippe-Chatrier.

The Spaniard set the tone early on with a break in the opening game as he comfortably cruised through the first set and was 3-0 up in the second before Tsitsipas started to mount a comeback.

The momentum stayed with Alcaraz as he stretched his lead following the tie-break though, and held his nerve to see out the third set.

The world number three has reached the semi-finals for the second consecutive year, and has booked a meeting with the new world number one, Jannik Sinner. 

Data Debrief: Alcaraz keeps chasing records

Alcaraz has become the youngest player since Andy Roddick in 2003 (v Xavier Malisse) to defeat a player in all his first six meetings in ATP events.

Not only that, but among players who started their career in the Open Era, only Bjorn Borg and John McEnroe (59 each) have registered 50 Men's Singles Grand Slam wins in fewer matches than Alcaraz (60).

Stefanos Tsitsipas set up a French Open quarter-final clash with Carlos Alcaraz on Sunday, recovering to beat Matteo Arnaldi in four sets after losing the opening set.

Tsitsipas – a beaten finalist at Roland Garros in 2021 – looked to be in a hole when Arnaldi took the opener within a comfortable 36 minutes, the Italian then racing into a 5-3 second-set lead.

However, the ninth seed saved three set points before flipping the momentum of the match with a crucial break, eventually closing out a 74-minute set in a tie-break.

The Greek produced a composed performance from there as he powered to a 3-6 7-6 (7-4) 6-2 6-2 victory, with Arnaldi's intensity dropping after he had dictated proceedings with some pinpoint groundstrokes early in the encounter.

Tsitsipas could now reach the French Open semi-finals for just the third time, though he will face a daunting task on Tuesday against Alcaraz, after the Wimbledon champion breezed past Felix Auger Aliassime in straight sets.

Data Debrief: Best clay season yet for Tsitsipas  

Tsitsipas entered the French Open in good form, having claimed the Monte-Carlo Masters title before falling just short in the final at Barcelona.

This is now his joint-best start to a clay-court season, having won 17 of his first 20 matches on the surface in 2024, a feat he has only previously achieved in 2021 and 2022. Only in 2021 (23) has he won more matches on clay in a single season overall. 

Carlos Alcaraz dug deep to overcome a spirited performance from Sebastian Korda in the third round of the French Open, claiming a 6-4 7-6 (7-5) 6-3 win.

Korda failed to build on an early break as Alcaraz took the opener on Court Philippe-Chatrier, but he appeared to have the Spaniard on the ropes when he forced a second-set tie-break.

However, the two-time grand slam champion clinched the tie-break with a huge forehand winner and seemed to grow in stature from there, moving well and displaying too much power for his American opponent.

Alcaraz put Korda under pressure from the off in the third set and did not give up a single break point on his own serve, converting the first of two match points with a neat serve and volley.

He will face either Ben Shelton or Felix Auger-Aliassime next, with Stefanos Tsitsipas potentially lurking in the quarter-finals.

Data Debrief: Alcaraz just too good

As was the case against Jesper de Jong in round two, Alcaraz looked to be under serious pressure on Friday, only to step things up and pull away from his opponent.

He has now won 14 of his 17 singles matches at the French Open, with his win ratio of 82.4 per cent the third highest among active male players, after Rafael Nadal (96.6 per cent) and Novak Djokovic (85.3 per cent). 

Tommy Paul reached the semi-final of the Italian Open after pulling through a rollercoaster clash with Hubert Hurkacz on Thursday.

The number 14 seed downed Hurkacz 7-5, 3-6, 6-3 in the quarter-final, keeping his composure during his two hours and 43 minutes on the court.

After winning the first set, Hurkacz fought back to win the second, but the American was not out of the contest yet as he clawed back from 0-2 down early in the third.

He closed out the win in a dramatic fashion, fending off six break points while letting three of his own slip, to eventually set up a semi-final against Stefanos Tsitsipas or Nicolas Jerry on Friday. 

Data Debrief: Into the final four

After beating Daniil Medvedev in the previous round, Paul has now won back-to-back matches against top-10 opponents for the first time in his professional career with his victory over Hurkacz. 

Paul earned his 150th tour-level win to take him through to his third Masters 1000 semi-final, as he aims to become the first American finalist in Rome since Andre Agassi in 2002.

Stefanos Tsitsipas brushed aside Casper Ruud to claim his third Monte-Carlo Masters title in four years.

The Greek star took just an hour and 37 minutes to see off his Norwegian opponent 6-1 6-4 on Court Rainier III.

Ruud dispatched world number one Novak Djokovic in the semi-finals but he could not repeat the feat as Tsitsipas once again produced his best tennis in the principality.

The title winner, who has had to overcome a back problem, told the ATP Tour’s official website: “It has been very difficult, so to be back on the podiums, winning tournaments just feels amazing.

“I can’t thank my family enough and friends – and if there is God out there – for making this moment possible. I am extremely grateful for every person behind this journey.

“The third time is even more special than the first or second time. This is an unbelievable win for me. Capturing that win today was nerve-wracking. I really wanted this trinity. I am extremely happy today.”

The 25-year-old 12th seed came out firing against the world number 10, breaking the struggling Ruud in the third game and clinching the first set at the second time of asking.

He had to save a break point in the first game of the second set and then three in the seventh as the improving Norwegian pushed for a way back into the match.

However, Tsitsipas then broke to edge himself towards the finishing line and complete a good afternoon’s work.

He said: “I am glad I presented on court and showed some ruthless tennis. From the beginning to the end my play was cohesive and I was able to blend in a lot of different shots.”

Meanwhile, Wimbledon champion Carlos Alcaraz has withdrawn from the Barcelona Open due to injury.

The world number three pulled out of the Monte-Carlo Masters with a right forearm problem and has not recovered in time to defend his title in his home country.

A statement from the tournament read: “Carlos Alcaraz will not be able to defend the title he won the last two seasons.

“The player from Murcia has suffered from the injury sustained in Monte Carlo, and did not have a good feeling in his training on Sunday and, despite having tried until the last moment, he will not be in the Barcelona Open.

“Wishing you a speedy recovery, we hope to see you next year.”

Fellow Spaniard Rafael Nadal is scheduled to make his comeback from injury at the tournament.

The 37-year-old has not played on the main tour since January due to a hip injury.