Carlos Alcaraz moved into the quarter-finals of the Barcelona Open with a straight-sets defeat of Roberto Bautista Agut, but it was a miserable Thursday for Alexander Zverev on home soil.

Defending champion Alcaraz won an all-Spanish contest with Bautista Agut 6-3 7-5 on Pista Rafa Nadal.

Top seed Alcaraz will face another compatriot in the form of Alejandro Davidovich Fokina, who saw off Emil Ruusuvuori, for a place in the last four in his homeland.

Eyeing a third title of the year, 19-year-old US Open champion Alcaraz was a break down at 3-2 in the opening set before winning six games in a row to take the opener.

Bautista Agut broke the teenager's serve twice midway through the second set, but the favourite reeled off nine points in a row to seal victory in an hour and 54 minutes.

Second seed Stefanos Tsitsipas defeated Denis Shapovalov 6-3 6-2, and Jannik Sinner, the fourth seed, battled past Yoshihito Nishioka 6-1 4-6 6-3, but Casper Ruud was beaten by Francisco Cerundolo in straight sets.

Lorenzo Musetti and Dan Evans advanced at the Real Club de Tenis Barcelona-1899 along with Alex de Minaur, who went through with a walkover as Grigor Dimitrov withdrew due to injury.

Meanwhile, there will be no third BMW Open title for Zverev in Munich this week after he suffered a shock loss at the hands of world number 82 Christopher O'Connell.

Australian O'Connell saw off the third seed 7-6 (7-2) 6-4, while defending champion and top seed Holger Rune ousted Yannick Hanfmann 6-3 6-4, and Taylor Fritz got past Marton Fucsovics in three sets.

Lorenzo Sonego was another seed who bowed out, Cristian Garin beating the Italian 6-3 7-6 (7-3).

Rafael Nadal remains unsure when he will return to action with the French Open looming after being forced to withdraw from the Madrid Open.

The 22-time grand slam champion has been struggling with a left hip issue that contributed to his second-round exit at the Australian Open in January.

Nadal pulled out of the Indian Wells Open and Miami Open, while the troublesome injury has also hampered the start of his favoured clay-court season.

Having withdrawn from the Monte Carlo Masters and Barcelona Open, the Spaniard is still not fit enough to participate in next week's Madrid Open on home soil.

And a concerned Nadal is now facing a race to be fit in time for the French Open, which begins in a little over five weeks' time.

"As you know, I suffered an important injury in Australia of the psoas [muscle]," he said in a video published on social media on Thursday.

"Initially it had to be a six-to-eight-week recovery period and we are now on fourteen. The reality is that the situation is not what we would have expected.

"All medical indications have been followed, but somehow the evolution has not been what they initially told us and we find ourselves in a difficult situation.

"The weeks are passing and I had the illusion of playing in tournaments that are the most important in my career, like Monte Carlo, Barcelona, ​​Madrid, Rome, Roland Garros. 

"For the moment, I have missed Monte Carlo and Barcelona. I will not be able to be in Madrid, unfortunately."

Nadal, who has played just four matches this season, added: "The injury still hasn't healed and I can't work out what I need to to compete. 

"I was training, but now a few days ago we decided to change course a bit, do another treatment and see if things improve to try to get to what comes next.

"I can't give deadlines because if I knew I would tell you but I don't know. This is how things are now."

Nadal won a record-extending 14th French Open title with a straight-sets victory over Casper Ruud in last year's final.

Stefanos Tsitsipas breezed into the third round of the Barcelona Open with a straight-sets win over Pedro Cachin on Wednesday.   Tsitsipas took 79 minutes to see off Argentine Pedro Cachin 6-4 6-2 on Pista Rafa Nadal.   The second seed from Greece did not face a break point and won all three that he fashioned to set up a meeting with Canadian Denis Shapovalov, who got the better of Jozef Kovalik 6-4, 6-3.   Jannik Sinner, the fourth seed from Italy, eased to a 6-2 6-4 win over Diego Schwartzman at the Real Club de Tennis Barcelona-1899.   Cameron Norrie and Lorenzo Musetti will do battle in round three after defeating Pavel Kotov and Jason Kubler respectively in straight sets.   Karen Khachanov beat Nicolas Jarry 6-4 6-4, while Grigor Dimitrov, Dan Evans, Alex de Minaur, Yoshihito Nishioka and Francisco Cerundolo also celebrated midweek wins.   Rain hit the schedule hard at the BMW Open, where Aslan Karatsev was leading Daniel Altmaie 3-0 in the third set when play was suspended in the only singles action of the day.  

Novak Djokovic was forced to come from a set down to beat Luca Van Assche 6-7 (4-7) 6-3 6-2 in the Srpska Open second round on Wednesday.

Teenager Van Assche took a big step towards a stunning victory after going a set ahead, but the world number one rallied to seal his progression against the stubborn Frenchman.

Djokovic, who admitted his right elbow "was not in an ideal condition" earlier this week after a shock exit at the Monte Carlo Masters, was not at his brilliant self as Van Assche took the first set by finding two crucial breaks in the tie-break.

The Serbian improved, though, and he dominated the second set by holding all five of his service games and breaking twice to take the match to a decider.

With the first two games of the final set going against serve, Djokovic took over to win four of the next six and secure a comeback triumph.

Just over a month ahead of the French Open, Djokovic will be glad to have battled to victory in Banja Luka as he prepares for an attempt to win a record 23rd grand slam title at Roland Garros having already claimed the Australian Open crown earlier this year.

Defending champion Carlos Alcaraz cruised into the third round of the Barcelona Open with a 6-3 6-1 straight sets rout of Nuno Borges.

The world number two thrilled his home crowd with a ruthless performance against his Portuguese opponent to reach the last 16, converting five break points along the way.

Alcaraz will be joined in the next round by third seed Casper Ruud, after the Norweigian overcame American Ben Shelton in a 6-2 7-6 (7-1) victory.

Roberto Bautista Agut will not join them, however, after he suffered a 6-2 6-2 loss to Bernabe Zapata Miralles.

At the BMW Open, Dominic Thiem set up a second-round clash with Marc-Andrea Husler after receiving a walkover against Constant Lestienne.

The 2020 US Open winner had been leading 6-3 when the match was abandoned at 0-0 in the second set, as fifth seed Sebastian Baez slipped to a 6-3 7-5 loss against home favourite Oscar Otte in Munich.

Novak Djokovic's right elbow is "not in an ideal condition" just over a month before the French Open gets under way.

The world number one wore strapping at the Monte Carlo Masters last week and suffered a shock 6-4 5-7 4-6 defeat to Lorenzo Musetti in the third round.

Djokovic, who had an elbow operation in 2018, will be back in action at the Srpska Open this week, facing Frenchman Luca Van Assche in the first round of the tournament in Bosnia and Herzegovina.

As he steps up his preparations to try and win a record 23rd grand slam title at Roland Garros, the 35-year-old revealed he is being hampered by his elbow.

"The elbow is not in an ideal condition, but let's say it’s good enough. I hope it will be fully ready for the first match," he said.

Djokovic expressed his gratitude for the way he has been received in Banja Luka this week.

"The people welcome me wholeheartedly with a great reception and so much love and support," he said.

"So I'm super excited to be here because I think it's one of the best places for us Serbian tennis players and athletes in general to be able to perform where we have so much love and support from local people."

Djokovic has a 16-2 record this year, winning a title in Adelaide before matching Rafael Nadal's haul of major triumphs at the Australian Open.

Defending champion Stefanos Tsitsipas and Daniil Medvedev were both dumped out at the quarter-final stage of the Monte Carlo Masters, with Taylor Fritz and Holger Rune advancing.

Seeded second and third respectively, Tsitsipas and Medvedev began Friday as the tournament's highest-ranked players following Novak Djokovic's shock exit, but both found themselves on the receiving end of comprehensive defeats.

World number three Tsitsipas was the victim as Fritz claimed his first victory over a top-10 ranked player on clay, ending the Greek's 12-match winning run at the competition with a 6-2 6-4 success.

Tsitsipas – who won the event in both 2021 and 2022 – was unable to contain Fritz as the American hit a series of huge winners en route to his third Masters 1000 semi-final.

Fritz will face Andrey Rublev in the final four after the fifth seed saw off the challenge of German qualifier Jan-Lennard Struff, posting a 6-1 7-6 (7-5) win.

Meanwhile, Medvedev came up short in his tussle with Rune, as the 19-year-old waltzed into his second Masters 1000 semi-final with a 6-3 6-4 triumph.

"It wasn't easy for sure, it's always tough to play Daniil," Rune said after his win. "It was actually my first time playing against him in a real match, but we've practised tonnes of times. 

"I have huge respect for everything he's done. In the last week it was not easy to stop him, but I'm happy I managed to do it."

Rune now has a 10-8 record in meetings with his fellow top-10 players, and he will have to win another such duel to make the final, with Jannik Sinner his semi-final opponent.

Sinner needed 76 minutes to beat fellow Italian Lorenzo Musetti 6-2 6-2, and the 21-year-old now has the chance to reach his third Masters 1000 final, having previously finished as runner-up at two editions of the Miami Open.

Novak Djokovic returned to action with an "ugly" win over Ivan Gakhov in the second round of the Monte Carlo Masters on Tuesday.

The world number one was competing for the first time in five weeks after missing the Indian Wells Open and Miami Open due to being unable to enter the United States.

Djokovic, who has since been cleared to compete in the US Open later this year, faced a spirited challenge from world number 198 Ivan Gakhov but advanced 7-6 (7-5) 6-2.

Gakhov broke his somewhat rusty opponent in the seventh game, but Djokovic hit back instantly as the opening set went to a tie-break.

The Serbian appeared rattled at various points, but an unforced error from Gakhov paved the way for Djokovic to open up some day light and take the opener.

The second set went the way of serve until the fifth game, when a double fault from Gakhov gave his opponent the chance to capitalise and see out the win.

"It was probably, if you can call it this way, an ugly tennis win for me today," Djokovic said in his on-court interview. "I haven't played my best, particularly in the first set. 

"And I kind of expected that that was going to happen in a way with swirly conditions, a lot of wind today, changing directions.

"It's different practising and then playing an official match on clay, where I guess no two bounces are the same. It's always quite unpredictable what's going to happen. 

"But all in all, I'm just pleased with the way I held my nerves I think in the important moments and I managed to clinch the two-set win."

Defending champion Stefanos Tsitsipas also advanced to the last 16 with a walkover win over Benjamin Bonzi, who retired with a wrist injury when 4-1 down in the opening set.

Fifth seed Andrey Rublev had a tougher time of things against Jaume Munar as he recovered from a set down to progress 4-6 6-2 6-2

Hubert Hurkacz was the other seeded player in action on Tuesday and defeated Jack Draper 6-3 6-7 (7-3) 7-5.

Casper Ruud clinched his 10th career ATP title with a straight-sets victory over Miomir Kecmanovic in Sunday's Estoril Open final, while Roberto Carballes Baena won the Grand Prix Hassan II.

Having enjoyed the best season of his career in 2022, Ruud was bidding for his first trophy success of 2023 in Portugal, and the world number five made a flying start to his clash with Kecmanovic.

Ruud wrapped up the opener in just 36 minutes, taking control with a huge forehand winner to break in just the third game.

The Norwegian navigated two three-set contests in order to reach the showpiece, and it looked like another of his matches may go the distance when Kecmanovic recovered to force a second-set tie-break.

However, a dipping backhand saw Ruud secure the second of two crucial mini breaks, and he took the first of his three championship points to cap a fine week with silverware, sealing a 6-2 7-6 (7-3) win.

Elsewhere, Carballes Baena won just his second career title, triumphing on the clay in Marrakesh where he beat Alexandre Muller 4-6 7-6 (7-3) 6-2.

France's Muller showed no signs of being overawed on his first final outing as he took the opener in impressive fashion, but Carballes Baena edged a tie-break in the second before dominating the decider.

Carballes Baena's triumph – recorded in just under three hours – gave him his first title since the 2018 Ecuador Open, which also came on his favoured clay surface.

Casper Ruud defeated Quentin Halys in a third-set tie-break to reach the final of the Estoril Open, where Miomir Kecmanovic awaits after defeating Marco Cecchinato.

The number one seed, competing in his first semi-final of the season, prevailed 6-4 3-6 7-6 (7-2) in Portugal to move within one match of a 10th singles title.

Ruud broke his opponent's serve in the opening game and saw out the first set, but Halys – competing in his first ATP Tour semi-final – hit back in the second to prolong the match.

Both men held as the contest went the distance, but Ruud's quality told as he raced 3-0 ahead in the deciding tie-break and did not look back as he set up a final with Kecmanovic.

World number 40 Kecmanovic needed a little over an hour to beat sixth seed Cecchinato, who had surprised Alejandro Davidovich Fokina in the previous round.

Kecmanovic, aiming to add to his only previous singles success in Kitzbuhel three years ago, held serve throughout to claim a 6-3 6-1 win over the 2018 French Open semi-finalist.

Elsewhere on Saturday, the final seeded player fell at the Grand Prix Hassan II as Dan Evans was defeated 2-6 6-4 6-2 by Roberto Carballes Baena.

Carballes Baena has now eliminated three seeded players and will face Alexandre Muller in Sunday's final after the Frenchman saw off Pavel Kotov in straight sets.

Muller edged a first-set tie-break and proved too strong in the second as he saw out a 7-6 (7-3) 7-5 victory in Marrakesh.

Tennis great Boris Becker has emerged from a spell in prison as "a stronger, better man", having been "humbled" by his conviction for concealing assets last year.

Six-time grand slam singles champion Becker was sentenced to two and a half years in jail last April, having been found guilty of concealing £2.5million worth of assets and loans to avoid paying debts when he was declared bankrupt in 2017.

The German was released after serving eight months of his sentence in December and was subsequently deported from the United Kingdom.

Speaking to BBC Radio 5 Live, Becker said he had learned valuable lessons from his stint inside, where his legendary tennis achievements counted for nothing. 

"Whoever says that prison life isn't hard and isn't difficult I think is lying," Becker said. "I was surrounded by murderers, drug dealers, rapists, people smugglers… by dangerous criminals.

"You fight every day for survival. Quickly you have to surround yourself with the tough boys, as I would call it, because you need protection.

"If you think you're better than everybody else then you lose. It doesn't matter that I was a tennis player. The only currency we have inside is our character and our personality. That's it, you have nothing else.

"You don't have any friends at first – you're literally on your own and that's the hard part. You have to really dig inside yourself about your qualities and your strengths but also your weaknesses."

Becker – who was previously a regular on the BBC's coverage of Wimbledon – reportedly cannot return to the UK until October 2024.

Having worked as a commentator with Eurosport in Germany for the Australian Open earlier this year, Becker is eager to rebuild his reputation. 

"I'm usually good in the fifth set – I've won the first two sets, I've lost the next two and I'm planning to win that," he said.

"It certainly humbled me, it made me realise that whether you're called Boris Becker or Paul Smith, if you break the law, you get convicted and you get incarcerated, that goes for everybody.

"I never expected the good and I certainly didn't expect the bad but I'm a survivor, I'm a tough cookie. 

"I've taken the penalties, I've taken the incarceration but I've also taken the glory and if anything this made me a stronger, better man. With my decisions in the future you can see whether I have learned from it or I didn't."

Rafael Nadal has confirmed he will not be competing at the Monte Carlo Masters.

Nadal, who has won 11 times in Monte Carlo, had been hoping to make his return from a hip injury at the ATP Masters 1000 event, which starts next week.

The 36-year-old has not played since going out to Mackenzie McDonald in the second round of the Australian Open in January.

Nadal previously cast doubt on his status for Monte Carlo last month, and on Tuesday he announced he will be unable to participate.

"Hi everyone, I'm still not ready to compete at the highest level," Nadal tweeted.

"I will not be able to play in one of the most important tournaments of my career, Monte Carlo.

"I am not yet in a position to play with the maximum guarantees and I continue my preparation process, hoping to return soon."

Nadal's latest setback is another blow in his preparations for the French Open, which starts at the end of May.

The Spaniard, who dominated in Monte Carlo between 2005 and 2012, has slipped down to number 14 in the ATP world rankings.

Novak Djokovic looks set to appear at the 2023 US Open after the United States Senate passed a bill to end COVID-19 restrictions.

The 22-time grand slam champion last competed in the tournament two years ago, losing to Daniil Medvedev 6-4 6-4 6-4 in the final.

He missed the 2022 edition because he had not been vaccinated against coronavirus, with the USA making vaccines a requirement for international travellers arriving in the country from November 8, 2021.

Djokovic was also absent for the 2022 Australian Open as he was deported from the country after immigration officials cancelled his visa because of the Serbian's unvaccinated status.

He returned to Melbourne Park at the start of this year and won a 10th Australian Open title – he will be hoping for a similar impact at Flushing Meadows after his return moved a step closer to reality.

On Wednesday, the US Senate voted in favour of ending the COVID-19 national emergency declared in March 2020, meaning the bill is now set to be considered by President Joe Biden, who is expected to sign.

As such, Djokovic will – assuming he is not ruled out for other reasons – be able to compete at this year's tournament, which is due to begin on August 28.

The news will surely come as major boost to Djokovic, who has already been prevented from entering US-based tournaments in 2023.

The 35-year-old was denied clearance to enter the US earlier in March ahead of Indian Wells and the Miami Open, with his application for special permission turned down by officials.

Rafael Nadal has cast doubt on a possible return at next month's Monte Carlo Masters after revealing he is still unsure when he will be ready to make his comeback.

The 22-time grand slam champion has been struggling with a left hip issue that contributed to his second-round exit at the Australian Open in January.

Nadal pulled out of hard-court contests at the Indian Wells Open and Miami Open as he continued to recover from the problem.

Speaking two weeks ago, Monte Carlo Masters director David Massey said Nadal was the first player to register for this year's Masters 1000 event, which begins on April 8.

The tournament's official Twitter account more recently suggested Nadal will "definitely" take part.

However, Nadal – who has slipped out of the world's top 10 men's tennis rankings for the first time in almost 18 years – denied that is the case.

"I don't know who gets this information," he is quoted as saying by Spanish publication Marca.

"Obviously if it were true, I would confirm it, but unfortunately I can't. I'm following my course and I don't know when I'll play again, that's the truth.

"I'm in a phase of increasing work. If I knew when I was going to return, I would say so, but I don't know.

"I can't confirm that I will play in Monte Carlo. Things are seen day by day. I prefer to say things when I really know them."

The Monte Carlo Masters kicks off the clay-court season ahead of events in Madrid and Rome, with the French Open – Nadal's favourite event – now just two months away.

Nadal has won the Monte Carlo Masters a record 11 times, though his most recent triumph came in 2018 with victory over Kei Nishikori in the final. 

Top seed and reigning champion Carlos Alcaraz dished out a bagel as he continued his outstanding form with a straight-sets victory over Dusan Lajovic to ease into the Miami Open fourth round on Sunday.

Alcaraz, who triumphed at last week's Indian Wells Open, beat the 76th-ranked Serbian 6-0 7-6 (7-5) in one hour and 32 minutes.

The 19-year-old Spaniard hit 26 winners compared to Lajovic's eight, while Alcaraz also sent down three aces on a 75 per cent first serve percentage.

Alcaraz won the first frame to love in 32 minutes, registering his fourth career bagel at ATP Masters 1000 level, equaling the most by a teenager alongside Rafael Nadal.

The world number one will face 2023 Australian Open semi-finalist Tommy Paul in the fourth round after the American got past 20th seed Alejandro Davidovich Fokina 6-3 7-5.

Third seed and 2022 Miami Open finalist Casper Ruud blew a first-set lead to lose 3-6 6-4 6-4 to Botic Van De Zandschulp.

The Dutchman improved his head-to-head record against Ruud to 3-1 with his first-ever top five win, with the Norwegian left to lament converting only two of 15 break points.

Ninth seed Taylor Fritz progressed into the fourth round with a 6-4 6-4 win over Denis Shapovalov, improving his head-to-head record against the Canadian to 4-5. Fritz committed only eight unforced errors and did not face one break point.

Jannik Sinner maintained his excellent hard-court form with his 18th win this season on the surface, as he defeated Grigor Dimitrov 6-3 6-4 in one hour and 28 minutes. The Italian 10th seed will be Andrey Rublev in the next round.

Sixth seed Rublev needed less than an hour to get past Miomir Kecmanovic 6-1 6-2, while compatriot Daniil Medvedev advanced via a walkover against Alex Molcan due to a right hip injury.

Seventh seed Holger Rune cruised past Diego Schwartzman 6-4 6-2, while Finland's Emil Ruusuvuori got past Taro Daniel 6-3 7-6 (7-3).