Serena Williams' presence at Wimbledon has left world number one Iga Swiatek "pretty overwhelmed".

Williams is making her long-awaited return to action at the All England Club, as the 40-year-old takes another shot at matching Margaret Court's record of 24 grand slam victories.

The American has played only two competitive matches – both alongside Ons Jabeur in the doubles at the Eastbourne International – since she sustained a hamstring tear at last year's Wimbledon, but is back on a wildcard.

Three years ago, Williams became the oldest player to reach Wimbledon's women's singles final when she lost to Simona Halep. Six years ago, she was the oldest champion when she beat Angelique Kerber, although it seems a long shot for her to be challenging for honours this time around.

That is in part due to the remarkable form of top seed Swiatek, who heads to SW19 on the back of a 35-match winning streak that she is aiming to extend.

The Pole was not born when Williams made her Wimbledon debut in 1998, but she was the junior champion at the All England Club in 2018 and has since won the French Open twice. She is aiming to become the first woman since Kerber in 2016 to win two singles slams in the same season.

Yet Swiatek remains in awe of Williams.

"I saw her yesterday, I was pretty overwhelmed," said Swiatek in a news conference on Saturday.

"I didn't know how to react. I wanted to meet her. I saw that she had so many people around her. I don't know her team. It was pretty weird.

"But just seeing her around is great because she's such a legend, there's nobody that has done so much in tennis.

"I'm pretty sure that she's going to be in good shape because she has so much experience coming back from breaks or just playing in grand slams. I think she can use it."

Swiatek has never progressed past the fourth round of the singles at Wimbledon and will be making her first appearance of the season on grass when she takes on Jana Fett on Tuesday.

"Honestly I still feel like I need to figure out grass," she said. "Last year for sure, it was that kind of tournament where I didn't know what to expect.

"Then match by match I realised maybe I can do more and more.

"I didn't have a lot of time to prepare. But I'm just trying to stay open-minded and kind of take positives from the situation and realise that I can play without any expectations."

Bianca Andreescu was denied her first WTA singles title since the 2019 US Open when Caroline Garcia fought back from behind to win a thrilling Bad Homburg Open final.

Garcia won her first WTA crown for three years by recovering to win a close encounter 6-7 (5-7) 6-4 6-4 on Saturday.

Andreescu went into the final as the strong favourite, a position she strengthened by narrowly claiming the first-set tie-break, but Garcia battled back to improve her impressive career record in finals to 8-3.

She claimed her first trophy since winning on the Nottingham grass in 2019, the same year as Andreescu's famous Flushing Meadows triumph.

Andreescu was playing in her sixth career showpiece, having enjoyed a standout week at the WTA 250 event. The Canadian did not drop a set en route to the final, which included beating top seed Daria Kasatkina.

But defeating the battling Garcia, who had saved a match point before beating fellow Frenchwoman Alize Cornet in the semi-finals, proved a step too far.

After winning three straight points to claim a tight tie-break, Andreescu was a break ahead at 4-2 in the second set before Garcia launched a strong comeback.

Andreescu was also a break up in the final set but Garcia – who broke five times throughout the contest - prevailed in two hours and 42 minutes.

With Wimbledon approaching, Andreescu was playing just her sixth tournament of the season following a six-month hiatus to look after her mental health that had followed a string of injuries over recent years.

A tremendous performance from Petra Kvitova saw her ease past Jelena Ostapenko in straight sets 6-3 6-2 to win the Eastbourne International on Saturday.

Reigning champion Ostapenko had not dropped a set on the way to the final, but could not halt Kvitova, who was making her first appearance in a final in 2022.

The former world number two – and two-time Wimbledon champion – made a strong start, breaking Ostapenko early on and racing to a 3-0 lead in the first set.

Ostapenko, the Latvian number eight seed, faced eight break points in the opening set, saving seven, but she was unable to force any of her own as Kvitova comfortably served out to move ahead.

Kvitova was hitting the ball with immense power, particularly on returns, but Ostapenko showed initial improvement in the second set with her first serve accuracy, which had been down at 55.9 per cent in the first.

However, it was not enough to keep her opponent at bay as some more fierce returning from Kvitova saw her break in the third game of the second set.

Ostapenko finally threatened to break the Czech's serve, but was unable to take any of the five break points she earned in a game that lasted more than 12 minutes.

Her first serve dropped off again, which allowed the relentless Kvitova to take full advantage, breaking for a second time before serving for the championship and sealing her first-ever Eastbourne title.

It was Kvitova's 29th triumph on the WTA Tour, but her first since March 2021. Her last success on grass had come in Birmingham four years ago.

Rafael Nadal is halfway to a calendar Grand Slam, a feat that would mark the crowning point of any player's career.

Yet the Spanish great does not have to look far back into history to see how quickly that dream can be scuppered, with Novak Djokovic having fallen agonisingly short of a sweep of all four majors only last year.

As perhaps the most grounded player in tennis, Nadal heads into Wimbledon well aware that winning the first two majors of the year is no guarantee of any future success.

At the age of 36, and with a foot problem that requires careful maintenance, it would be arguably the most remarkable feat in the Open Era if Nadal were to add the Wimbledon and US Open titles to his Australian Open and French Open triumphs.

Such dominance is scarce in tennis, and Rod Laver was the last player to scoop all four men's singles titles at the majors, all the way back in 1969.

Steffi Graf won all four on the women's side in 1988, and it seemed a knock-in that Serena Williams would do likewise in 2015 when she headed to the US Open with three majors already bagged.

But Williams famously came unstuck when she faced Roberta Vinci in the semi-finals, while Djokovic went even closer in 2021, losing to Daniil Medvedev in the final at Flushing Meadows.

Here, Stats Perform examines the daunting challenge of scooping all four slams consecutively.

WHAT THE GREAT CHAMPIONS SAY

Before tennis reached its Open Era, which marked the dawning of professionalism on the tour, Laver won his first calendar Grand Slam in 1962.

He said later, quoted by the Tennis Hall of Fame: "It was a thrill to come off the court knowing I had won all four majors in one year. But I never felt like I was the best, never felt that way. I just happened to have a good year."

His 1969 dominance came a year after Laver returned to the majors, following a five-year exile while he played professional tennis elsewhere. When the majors allowed professionals to compete alongside the amateurs, 'Rocket Rod' was again unstoppable.

Laver turned 31 in 1969 and did not win any further grand slam singles titles in his career after that astonishing season, but that second perfect season sealed his legacy as an all-time great.

Stefan Edberg won a boys' singles clean sweep in 1983, but Laver remains the only player to win the men's singles full set in a calendar year since American Don Budge captured all four in the 1938 season, the first time it was achieved by a man. Maureen Connolly and Margaret Court achieved calendar Grand Slams in women's singles in 1953 and 1970 respectively.

A non-calendar Grand Slam was accomplished by Djokovic, when he won Wimbledon, the US Open, Australian Open and French Open consecutively across the 2015 and 2016 seasons. Yet no man other than Laver, Budge and Djokovic has won all four singles crowns in succession.

It has been 11 years since Nadal himself went close. He went to the Australian Open in 2011 with the Roland Garros, Wimbledon and US Open trophies in the bag, looking to complete the set.

"I am sure it's going to be the only one opportunity that I'm going to have in my life," said Nadal that year. "I'm not going to have more of these opportunities to win all four in a row.

"I think it is almost impossible. It is very, very difficult, no? Tennis is a very competitive sport and there is not a lot of difference between players. So a lot of matches are decided in a few balls. So for that reason it is very difficult to have one player winning everything. That's the truth."

Nadal, hampered by injury, lost in the Melbourne quarter-finals to David Ferrer in 2011 and had not won back-to-back slams since, until this year's surprise double. 

REACHING PRESSURE POINT

It is too soon to think that Nadal has a glorious chance to land all four big ones this year. After all, although he has won Wimbledon twice before, those triumphs came in 2008 and 2010, and he has a chronic foot problem. He has required radiofrequency ablation treatment in the past fortnight, preventing nerves in his foot sending messages to his brain.

He fell to Djokovic in the 2011 Wimbledon final and has not been back to the title match since, suffering a run of disappointing early exits in London before reaching semi-finals in 2018 and 2019, his last visits to the tournament.

Djokovic is a heavy favourite for this year's title, but it would be bold to entirely rule out Nadal, particularly given that as the second seed he cannot run into Djokovic until the final. Particularly given that he is Rafael Nadal, and prone to doing stupendous things.

Serbian Djokovic, a year Nadal's junior, would be able to tell his great rival just how intense the strain can become when a calendar Grand Slam becomes a serious prospect.

Speaking in November last year, two months after Medvedev denied him in New York, Djokovic said: "I'm very relieved that the grand slam season was done, because I felt a tremendous pressure unlike anything I felt in my life.

"It was an interesting experience, and I'm very satisfied with the way I played in grand slams, three wins and a final. There are much more positive things to be grateful for and to look at than negative."

Like Djokovic, Serena Williams has managed the non-calendar Grand Slam before, with the American first achieving that from the French Open in 2002 to the Australian Open in 2003, and in 2015 she was aiming for five slams in a row when she arrived at the US Open, having begun her dominant streak at her home grand slam the previous year.

That would have meant Williams sealed each of the 2015 slams, and losing to Vinci led to stark frustration, underlined by a terse response to the question of how disappointed she felt by the result.

"I don't want to talk about how disappointing it is for me," Williams said. "If you have any other questions, I'm open for that."

Sometimes, players get ahead of themselves when looking at the season ahead, and Naomi Osaka had a calendar Grand Slam in her thoughts after winning the season-opening Australian Open in 2019.

She had also triumphed at the US Open at the end of 2018, and the Japanese star was beginning to think she might enjoy an invincible year at the majors, only to stumble to a third-round French Open defeat to Katerina Siniakova.

Osaka said: "I think I was overthinking this calendar slam. For me this is something that I have wanted to do forever, but I have to think about it like if it was that easy, everyone would have done it."

Roberto Bautista Agut stands in the way of Stefanos Tsitsipas and his first grass-court title.

Making his debut at the Mallorca Championships, Tsitsipas sealed his maiden appearance in a grass-court final by cruising past Benjamin Bonzi 6-4 6-4 on Friday.

The world number six has now reached four finals this season, having lost two of the previous three – winning on clay at the Monte Carlo Masters.

It was the second meeting between the pair in as many weeks, with the Greek having also downed Bonzi at the Halle Open.

And Tsitsipas now has a chance to warm up for Wimbledon in winning fashion.

"It was a good match. I am very happy today," Tsitsipas said in his on-court interview. "I have played a final a week before a grand slam before. It was the year I made the final at Roland Garros, in Lyon.

"It worked out pretty well to have that final and consistency of matches. It is different this time. We are talking about a different surface, so we will see."

Tsitsipas has now claimed a tour-leading 39 wins this season, but standing between the 23-year-old and silverware is Spaniard Bautista Agut, who reached a 20th career final by beating Antoine Bellier 7-6 (7-5) 6-2.

Like Tsitsipas, Bautista Agut is aiming for a second title of the season.

At the Eastbourne International, two Americans will vie for the title after Indian Wells Masters champion Taylor Fritz saw off a tough challenge from Alex de Minaur while Maxime Cressy defeated home favourite Jack Draper 7-6 (7-5) 6-7 (2-7) 6-3.

Fritz, who triumphed at Eastbourne in 2019 – similarly against an American, in Sam Querrey – but has found his best form hard to come by of late, also needed three sets to get the better of De Minaur, eventually succeeding 6-1 6-7 (5-7) 6-3.

"It's amazing," Fritz said. "I was having a bit of a rough start coming back from injury to the grass season, and then I came here and the first day I was here I just immediately felt like I was playing good tennis again.

"I just have a lot of confidence being here, obviously great memories, so I'm really excited to come back out and play for the title again."

Reigning Eastbourne International champion Jelena Ostapenko will go up against Petra Kvitova in 2022 Saturday's final.

Ostapenko won as a wildcard in 2021, and the world number 14 confirmed her place in this year's showdown by overcoming Camila Giorgi on Friday.

She is the first female player to reach back-to-back finals in Eastbourne since Caroline Wozniacki in 2017 and 2018.

The Latvian, who is also going to compete for the doubles title, prevailed 6-2 6-2 and will now go up against Kvitova. The pair have faced off eight times previously, with each player winning four matches.

It is Kvitova's first appearance in a final in 2022, with the former world number two – and two-time Wimbledon champion – having ended Beatriz Haddad Maia's winning streak.

Haddad Maia won in Birmingham last week and Nottingham the week before, but her run came to an end at 12 matches, with Kvitova triumphing 7-6 (7-5) 6-4.

"For me, a final after almost a year [without one] will be great, so I’m glad already," said Kvitova, who was a runner-up at Eastbourne in 2011 and last reached a final on grass in Birmingham four years ago.

"Jelena loves to play here, obviously, we saw it, she has a really great game for grass."

Meanwhile, at the Bad Homburg Open, 2019 US Open champion Bianca Andreescu reached her sixth career final courtesy of a walkover against Simona Halep.

The Romanian withdrew from the semi-final clash with a neck injury, which will worry the 2019 Wimbledon champion ahead of the season's third grand slam at the All England Club.

"I am sorry that I had to withdraw today before my semi-final match," Halep said in a statement.

"But unfortunately I woke up this morning with a blocked neck and this is not allowing me to perform to the best of my ability."

Andreescu will face Caroline Garcia, who saved a match point before going on to beat fellow Frenchwoman Alize Cornet 7-6 (11-9) 3-6 7-5 to reach an 11th tour-level showpiece.

Former Wimbledon doubles champion Pam Shriver has said she does not disagree with the decision to ban Russian and Belarusian players from this year's tournament.

Shriver landed 21 women's doubles grand slam titles, of which 20 came in partnership with Martina Navratilova, and 112 career doubles titles in all, and she also claimed 21 singles tournament wins.

Russian and Belarusian players have been banned from this year's Wimbledon due to the ongoing Russian invasion of Ukraine.

Speaking to Stats Perform, Shriver – who won five women's doubles championships with Navratilova at Wimbledon – said while she did not like that it was a decision that needed to be made, she did not object to it.

"War is messy, right? War is tragic. It's been a horror show for Ukrainian people," said American Shriver. "And there's a lot of Ukrainian professional tennis players that are just living through hell.

"Obviously, the decision has been made to try and have the tightest of sanctions. So when you think about the industry of pro tennis, if we're going to have sanctions as well, then Wimbledon [should too], and I understand the UK government has put some pressure throughout the country to not do business with Russians during this time.

"I wish they had never had to make the decision, but I think under the circumstances, I can't say I disagree [with it]."

Shriver also said the decision from the ATP, WTA and ITF to remove ranking points from this year's tournament was "really unfortunate".

However, she does not believe it will make Wimbledon seem like an exhibition, saying: "It's not an exhibition because of the prize money and because of the prestige of winning a Wimbledon title.

"Those are actually the two main things. I think the points are third, and so you're missing the third most important aspect, but the prize money is huge, and [the tournament] will be just as prestigious as ever."

As a result of the ban on Russian players, men's world number one Daniil Medvedev will not be in attendance at SW19, but Shriver does not think it will diminish the competition.

"You know, maybe some years it would [be a problem that Medvedev is not there] but... you're going to have the number one seed being [Novak] Djokovic and number two seed being [Rafael] Nadal," she said.

"When you have the player who has more majors than anybody else ever in the men's game at 22, Rafa, and you have Novak trying to win his fourth straight Wimbledon and his seventh overall and trying to chase Rafa's 22, I think that's going to hide the fact we don't have a number one.

"It's going to be an unusual year to not have rankings one and two [Medvedev and the injured Alexander Zverev], but I feel like the names on the men's side, [Carlos] Alcaraz, [Matteo] Berrettini, [Hubert] Hurkacz got to the semis last year, the two Canadian guys [Felix Auger-Aliassime and Denis Shapovalov].

"I feel like there's still such great depth and with Rafa and Novak leading the way, it's fine."

Novak Djokovic and Rafael Nadal avoided the looming threat of Andy Murray and Nick Kyrgios in Friday's Wimbledon draw.

With both Murray and Kyrgios unseeded, they could have been drawn to face any of the top seeds, but it did not work out that way, most likely to everyone's satisfaction.

Instead, top seed and tournament favourite Djokovic drew South Korean Kwon Soon-woo, while Nadal was pitted with 23-year-old Argentinian Francisco Cerundolo.

Djokovic will be bidding for a seventh Wimbledon title and a fourth in succession following triumphs in 2018, 2019 and 2021, after the cancellation of the 2020 championships.

For second seed Nadal, who has won the Australian Open and French Open already this year to reach a record 22 men's grand slam singles titles, there is the possibility of a rare calendar Grand Slam.

He must carry off the title at Wimbledon for the first time since 2010 to stay in the hunt for that elusive clean sweep, last achieved in men's singles in 1969 by Rod Laver.

Murray, who like Nadal is a two-time former Wimbledon champion, was paired with James Duckworth of Australia and could face big-serving American John Isner in round two. Murray has been troubled by an abdominal strain in the past fortnight, and it remains to be seen whether the 35-year-old is in shape to be a contender.

Duckworth's countryman Kyrgios has been in fine form of late, reaching consecutive semi-finals in Houston, Stuttgart and Halle before he too suffered an abdominal twinge this week and withdrew from the Mallorca Championships. Kyrgios will start against Britain's Paul Jubb at Wimbledon.

A notable first-round clash saw three-time major winner Stan Wawrinka, in the draw on a wildcard, paired with Italian 10th seed Sinner, while Matteo Berrettini, runner-up to Djokovic last year, will play Chile's Cristian Garin.

Powerful Italian Berrettini, who has won the Stuttgart and Queen's Club titles on grass this year, features on Nadal's side of the draw, while in the top half Djokovic has the likes of Carlos Alcaraz and Hubert Hurkacz for company.

Alcaraz, the 19-year-old Spanish revelation who has won four titles already this year, was drawn to face the experienced German Jan-Lennard Struff in round one.

Men's third seed Casper Ruud has never won a singles match at Wimbledon, losing in the first round on his previous two appearances. The recent French Open runner-up will look to get off the mark on the SW19 grass against 34-year-old Spaniard Albert Ramos-Vinolas.

Serena Williams will begin her Wimbledon challenge against French player Harmony Tan, who will be making her main-draw debut.

For 40-year-old American Williams, a seven-time Wimbledon singles champion, there will be relief at avoiding a seed in the first round.

That was a possibility given that Williams is in the draw on a wildcard, having not played singles since suffering an ankle injury in her Wimbledon opener 12 months ago.

Instead, the 23-time grand slam winner will face the world number 113, who lost in the first round of the recent French Open, perhaps as soft a landing as Williams could have had.

Wimbledon begins on Monday at the All England Club, with women's defending champion Ash Barty not involved after announcing a shock retirement in March.

Williams has returned to action this week at the Eastbourne International, winning through two rounds in doubles alongside Ons Jabeur, before the duo pulled out due to a knee worry for Jabeur.

Awaiting the winner of Williams versus Tan will be American Christina McHale or Spanish 32nd seed Sara Sorribes Tormo, while last year's runner-up Karolina Pliskova is a potential third-round obstacle.

Women's top seed Iga Swiatek starts against Croatian qualifier Jana Fett, while Britain's US Open champion Emma Raducanu was drawn to face the experienced Belgian Alison Van Uytvanck, a player who knocked out the then-defending champion Garbine Muguruza at Wimbledon four years ago.

Tunisian third seed Jabeur was paired with Swedish qualifier Mirjam Bjorklund, Pliskova faces fellow Czech Tereza Martincova, and American Coco Gauff, fresh from a first grand slam final in Paris, drew Romanian Elena-Gabriela Ruse.

Estonia's Anett Kontaveit, who may struggle to live up to her billing as the second seed having never previously gone past round three, plays American Bernarda Pera first up.

Among former champions, Angelique Kerber tackles Kristina Mladenovic in her opener, while Simona Halep was handed a tough assignment against Karolina Muchova.

Of all the players in the draw this year, Muchova is the woman with the highest winning percentage in Wimbledon main draw matches.

The Czech has an 80 per cent success record, winning eight matches and losing twice after reaching the quarter-finals in her both previous appearances, losing to Elina Svitolina in 2019 and Kerber last season.

Top seed Daniil Medvedev crashed out of the Mallorca Championships following a straight-sets defeat by Roberto Bautista Agut in the quarter-finals.

Reigning champion Medvedev was a commanding winner when he locked horns with Bautista Agut in Halle last week.

But the Spaniard gained revenge this time around, prevailing 6-3 6-2 for his fourth victory in five meetings with the world number one.

"I had to play very good to beat Daniil," said the former Wimbledon semi-finalist. "He’s the number one; the last champion here in Mallorca. He just beat me a few days ago.

"I played a really compete match. I was more convinced with my game, hitting strong, very solid. I think I did a really good match."

Next up for the Doha champion is Antoine Bellier after the Swiss qualifier came from behind to defeat Dutchman Tallon Griekspoor 5-7 7-6 (7-5) 6-2.

Elsewhere, Stefanos Tsitsipas is through to his first tour-level semi-final on grass after eventually seeing off Marcos Giron 7-6 (7-5) 4-6 6-3.

The former Roland Garros runner-up, who hit 13 aces, claimed the crucial break in game eight of the deciding set to extend his record tally of wins for the campaign to 38.

The world number six will play Benjamin Bonzi in the last four after the Frenchman overcame Daniel Altmaier 6-3 6-4.

Meanwhile, Cameron Norrie was beaten in the quarter-finals of the Eastbourne International, the top seed going down 7-5 7-5 against Maxime Cressy.

The debutant hit 10 aces and won 80 per cent of points on his first serve to advance to a second tour-level semi-final of the season.

There, he will play Jack Draper, who built on his victory over Diego Schwartzman by downing compatriot Ryan Peniston 6-3 6-3 to seal his maiden ATP semi-final appearance.

Reigning champion Alex De Minaur overcame Tommy Paul 6-2 4-6 6-4 to set up a clash with 2019 winner Taylor Fritz, who claimed his seventh successive victory at Eastbourne after seeing off Alexander Bublik 6-3 6-2 in just 67 minutes.

Carlos Alcaraz does not believe he should be considered among the favourites to win Wimbledon given his lack of experience playing on grass. 

The teenage Spaniard is enjoying a breakout season, having won a pair of ATP Masters 1000 titles in Miami and Madrid and picked up further silverware in Rio de Janeiro and Barcelona. 

Alcaraz has been seeded fifth for just his second main-draw appearance at Wimbledon. Last year, he beat Yasutaka Uchiyama in five sets before falling to a straight-sets defeat against Daniil Medvedev. 

They are Alcaraz's only ATP Tour-level matches on grass, so his main focus heading to the All England Club is to simply improve his feel for the surface. 

"I don't mind being in the spotlight, I don't see it as pressure, but I've seen that I'm considered one of the favourites for Wimbledon. I don't see it that way at all," Alcaraz told the Spanish media. 

"There are many players who play better than me on grass. [Novak] Djokovic, Rafa [Rafael Nadal], [Matteo] Berrettini... We are going to try to gain experience on this surface. 

"Knowing how to move well on grass is very important. I think it's the key to being able to get good results. We're trying to improve in mobility and the small details that are more important on this surface. 

"Being more aggressive, trying to take advantage of the fact that I volley well – those things." 

Alcaraz is playing an exhibition tournament at Hurlingham this week and lost his opening match against Frances Tiafoe 6-4 6-2 on Thursday. 

The world number seven has been struggling with an elbow issue, but experienced no discomfort during his defeat. 

"A week ago, I couldn't train at all," he added. "I came here unsure if I was going to be able to play normally.

"The days I've been able to train I've felt quite well – zero pain in the elbow – and today there was no pain in the match with Tiafoe."

Bianca Andreescu dismantled top seed Daria Kasatkina to reach the semi-finals of the Bad Homburg Open, while Beatriz Haddad Maia moved a step closer to a third straight title in Eastbourne. 

A resounding 6-4 6-1 win over Kasatkina saw Andreescu advance to the last four of a WTA Tour grass-court tournament for the first time. 

The last time she reached the semi-finals in any event was the 2021 Miami Open, where she finished as runner-up after retiring with an ankle injury in the second set of the final against Ash Barty. 

Andreescu limited Kasatkina to just 17.6 per cent of the points behind the Russian's second serve and saved four of the six break points she faced to book a meeting with Simona Halep. 

Former world number one Halep sent down 10 aces and converted all three of the break points that came her way in a 6-2 6-1 success over Amanda Anisimova. 

The other semi-final will be an all-French affair after Alize Cornet and Caroline Garcia downed home hopes Angelique Kerber and Sabine Lisicki respectively. 

After going all the way in Nottingham and Birmingham this month, Haddad Maia progressed to the semi-finals of the Eastbourne International courtesy of a walkover against Lesia Tsurenko. 

Next up for Haddad Maia is Petra Kvitova, who she beat in straight sets in the first round in Birmingham, after the Czech ended Harriet Dart's run to the quarter-finals with a 6-3 6-4 win. 

Jelena Ostapenko cruised to a 6-3 6-2 victory against Anhelina Kalinina and will take on Camila Giorgi for a place in the final. Giorgi comfortably overcame lucky loser Viktoriya Tomova 6-2 6-1 in 64 minutes. 

Serena Williams and Ons Jabeur have pulled out of their Eastbourne International doubles semi-final due to an injury concern just days before Wimbledon begins.

Organisers said Tunisian world number three singles star Jabeur was troubled by a right knee injury, forcing her brief alliance with Williams to come to an end.

They had won through two rounds in increasingly impressive style, with Williams making her return to the WTA Tour, having not played competitive tennis since injuring an ankle at Wimbledon last year.

The 40-year-old Williams was clearly enjoying the partnership with Jabeur, who in May became the first African or Arab woman to win a WTA 1000 singles title when she triumphed at the Madrid Open.

They had named themselves 'Onsrena' and were due to face Aleksandra Krunic and Magda Linette in the semi-finals, before news emerged on Thursday of their withdrawal.

No details of the seriousness of Jabeur's injury were disclosed, and it may prove a precautionary withdrawal given Wimbledon is so close, with the latter starting on Monday.

Jabeur won a title on grass in Berlin last week, showing she could pose a threat to top seed Iga Swiatek, providing she is not hampered by injury.

Williams, a 23-time grand slam singles champion, will also be competing at Wimbledon after being handed a wildcard entry into the tournament where she has won seven singles titles.

Nick Kyrgios has lamented the ATP Tour trialling off-court coaching, warning tennis will lose one of the "unique traits that no other sport had".

The ATP announced on Tuesday that off-court coaching will be tested in the second half of the season, with coaching permitted by a designated person in qualifying and main draw matches.

Verbal coaching will be permitted when players are at the same side of the court as their coach, with non-verbal instructions – for example hand signals – allowed at any time.

Patrick Mouratoglou coached former world number one Serena Williams and now works with Simona Halep, and was quick to welcome the introduction.

Mouratoglou suggested the coaching methods have been used at "almost every match for decades".

While Mouratoglou was a vocal supporter of the ATP decision, Kyrgios – who pulled out of the Mallorca Championships with injury – hit back and slammed the proposed changes.

"Completely disagree. Loses one of the only unique traits that no other sport had," Kyrgios responded to Mouratoglou's post on Twitter.

"The player had to figure out things on his own. That was the beauty of it. What happens if a high-profile player versus a low-ranked player who doesn't have or [cannot] afford a coach?"

The trial commences on July 11 and will be evaluated at the end of the 2022 season, to assess the potential inclusion of off-court coaching in subsequent seasons.

Serena Williams lauded her doubles partner Ons Jabeur after they advanced to the semi-finals of the Eastbourne International on Wednesday. 

Playing in her first tournament since retiring from the opening round of Wimbledon injured last year, Williams acknowledged she was particularly reliant on Jabeur during their 6-2 6-4 success over Shuko Aoyama and Chan Hao-ching. 

The 23-time grand slam singles champion opted to only play doubles on the south coast as she gears up for a return to the All England Club. 

"I think we played together much better," said Williams. "Although I thought we played really good together [against Maria Bouzkova and Sara Sorribes Tormo on Tuesday] too. 

"But Ons really held me up. She was really playing so good. I was looking at her and was like, 'Wow, this is great.' It's good." 

Williams and Jabeur will take on Aleksandra Krunic and Magda Linette for a place in the final. 

Jabeur playfully asked the 40-year-old if she would like to play together at the US Open, to which the former world number one responded: "Sign me up!" 

The Tunisian added: "I'm getting used to this. It was really great to play here and I didn't know we are in the semi-finals. It's super fast, but it's great for us."