Naomi Osaka, winner of the past two Grand Slam tournaments, has parted ways with her coach Sascha Bajin.
World number one Novak Djokovic is considering going without a coach after 20 years in professional tennis, the Serb said after receiving the top men's honour at the Laureus awards.
Up against higher-ranked Miomir Kecmanovic (No. 53) of Serbia in the first round, the world No. 72, who has qualified for the 2024 Paris Olympics, lost 2-6, 6-3, 3-6, 4-6.
World number one Novak Djokovic's French Open preparations were dealt with a blow as he suffered a 6-3, 4-6, 6-2 defeat by Russian Daniil Medvedev in the Monte Carlo Masters quarter-finals on Friday.
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Sumit Nagal won the Heilbronner Neckarcup ATP Challenger event beating Alexander Ritschard of Switzerland
Rafael Nadal's absence from Indian Wells saw the 22-times Grand Slam champion slip out of the top 10 for the first time since 2005.
Rafael Nadal ended his four-year wait for a ninth Monte Carlo Masters title by defeating Gael Monfils 7-5, 5-7, 6-0 on Sunday in his 100th career final.
Nadal skipped tournaments at Indian Wells and Miami as well as the ongoing Monte Carlo Masters after suffering the injury he suffered at the Australian Open.
His representative Benito Perez-Barbadillo said the results of the surgery were expected on Saturday.
Russian Andrey Rublev beat Norwegian top seed Casper Ruud
Carlos Alcaraz made a winning start in his bid to claim a first French Open title
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Last year's runner-up and seventh seed Ruud will now advance to the semi-finals, where he could face fourth seed Alexander Zverev or 11th seed Alex de Minaur.
Novak Djokovic's gamble to test his injured ankle at the Monte Carlo Masters appeared to be backfiring but he dug his heels in to battle past Russian Mikhail Youzhny 4-6, 6-1, 6-4 in the second round on Wednesday.
The ATP Tour brought the world number ones for a short conversation as they prepared for the prestigious tournament.
The Wimbledon men's singles semi-finals take centre stage at the All England Club on Friday.
The India-Pakistan tennis duo of Rohan Bopanna and Aisam-ul-Haq Qureshi advanced to the semi-finals of the Monte Carlo ATP Masters tournament, shocking second seeds Daniel Nestor and Max Mirnyi in the quarter-finals on Friday.
Top seed Novak Djokovic eased into the third round of the Monte Carlo Masters with a 6-2, 6-3 win over France's Florent Serra on Wednesday. Serbian Djokovic will next face Stanislas Wawrinka, seeded 13th, for a place in the quarter-finals after the Swiss beat Latvia's Ernests Gulbis 6-1, 6-4.
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Australian Open champion Rafael Nadal resumed training on Monday after four weeks out due a stress fracture in his rib, a month out from the French Open where the Spaniard will bid for a record-extending 14th title.
World number one Roger Federer got back into his old routine with a 6-3, 6-4 defeat of France's Gael Monfils to reach the Monte Carlo Masters quarter-finals on Thursday.
Tabilo broke the top seed four times on Centre Court while not conceding a single break point.
Rohan Bopanna and his French partner Edouard Roger-Vasselin will look to seal a spot in the semi-finals of the Barcelona Open
Twenty four time Grand Slam champion Novak Djokovic closed the 2023 ATP season by clinching the year-end No. 1 spot for a record-extending eighth time.
Earlier, title holder Borna Coric beat American Sebastian Korda 7-6 (5), 6-4, while another home hope Taylor Fritz survived a first-set thriller to beat Czech Jiri Lehecka 7-6 (14), 6-2.
Take a look at the five top contenders for the men's singles title at the French Open:
Alexander Zverev continued to rebuild his confidence on clay with a straight sets win over Spain's Roberto Bautista Agut in the Monte Carlo Masters second round.
Fears that Rafael Nadak may miss the French Open grew after he pulled out of this week's Italian Open.
Coria will play Rafael Nadal in the final of the Rome Masters.
'Whilst I feel fit and healthy, I would like to give it a go.'
'I'm disappointed and sad because after a good start to the season I was coming to a very important part of the year with very good feelings and good results.'
'So to have a person by your side that you love and can comfortably and mutually and reciprocally talk about tennis in our case, I think it's a breath of fresh air.'
World No 3 Roger Federer has delayed his ATP World Tour return by a month and plans to make his comeback from knee surgery at the Monte Carlo Masters in April.