Osaka withdrew from last year's French Open following a row with tournament organisers over media duties, explaining that she had been suffering from depression for almost three years.
A summary of Thursday's action at the US Open.
Former U.S. Open champion Juan Martin del Potro stepped up his comeback from another wrist surgery by toppling top seed Fabio Fognini at the Sydney International on Wednesday.
Tennis matches at the Ariake Tennis Park will begin from 3pm local time (0600 GMT) from Thursday, governing body International Tennis Federation said after requests from players who had struggled in the stifling weather.
This year's French Open welcomes up to 5,388 spectators
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.
Serena Williams and Marin Cilic both survived third round scares on Friday to keep their US Open title defences on track but there was no escape for Rafael Nadal with the twice-winner going down in a late night thriller.
Alexander Zverev received a suspended eight-week ban for smashing his racket against the umpire's chair at last month's ATP 500 event in Acapulco, for which he was expelled from the tournament.
A summary of the first day's play at the US Open.
World number one Andy Murray beat Romanian Marius Copil 6-4, 6-3 to reach the third round of the Madrid Open on Tuesday.
Spain's David Ferrer, his eyes fixed on qualifying yet again for the ATP World Tour Finals, romped past fellow Spaniard Guillermo Garcia-Lopez 6-1, 6-1 to reach the quarter-finals of the Vienna Open on Thursday.
Six-times winners Spain will meet Croatia for a place in the semi-finals.
British pair Jamie Murray and Dominic Inglot defeated Canadians Daniel Nestor and Vasek Pospisil in four sets in Ottawa to give Britain a 2-1 lead ahead of Sunday's reverse singles.
Third seed Stanislas Wawrinka became the latest high-profile casualty at the Italian Open on Thursday when the Swiss was knocked out in the third round by American John Isner.
Tomic had to battle hard against the top seed, saving four match points in a tense final set before wrapping up the match in two hours and 15 minutes.
Eighteen time Grand Slam champion Roger Federer has climbed up to the fourth spot in the latest ATP rankings after lifting his third Miami Open title by beating long-time rival Rafael Nadal.
World No. 3 David Ferrer has reached the semi-finals of the Valencia Open for the fourth consecutive year with a 6-4, 4-6, 6-0 win over fifth seed Jerzy Janowicz.
Roger Federer suffered a shocking straight-set defeat against Argentine qualifier Federico Delbonis in the semi-finals of the German Open in Hamburg.
ormer world number one Andy Murray showed some more positive signs in his injury comeback but eventually went down in a bruising battle with Italy's Fabio Fognini.
Roger Federer made a comfortable start to his quest for a 100th title, despatching Fabio Fognini in straight sets to ease into the quarter-finals at the Paris Masters on Thursday.
Gauff vows to be more aggressive in Osaka showdown
Sania and her Chinese Taipei partner Su-Wei Hsieh, seeded second, defeated the Argentine-Swiss combine of Maria Irigoyen and Romina Oprandi 6-2, 6-0 in 48 minutes, while tenth seeds Paes and Raven Klaasen of South Africa beat the American duo of Scott Lipsky and Rajeev Ram 6-4, 7-6(6).
Rafael Nadal moved into the Miami Open semi-finals with a straight sets win over American Jack Sock on Wednesday.
Leander Paes and Canada's Daniel Nestor beat the Spanish combination of Fernando Verdasco and David Marrero 7-6(10-8), 6-3 in 83 minutes, while Sania Mirza and her Zimbabwean partner Cara Black beat Chinese Taipei's Yung-Jan Chan and Jie Zheng.
India's Rohan Bopanna and his French partner Edouard Roger-Vasselin stormed into the pre-quarterfinals of the Australian Open after registering a comfortable straight sets victory in the men's doubles, on Friday.
Paes and Raja dispatched the pair of Nikoloz Basilashvili and Andreas Haider-Maurer 6-2, 6-3 in their opening round.
The French Tennis Federation (FFT) has provisionally suspended Benoit Paire, Kristina Mladenovic and Caroline Garcia for 'damaging' the organisation's image by their behaviour at this month's Rio Olympics.
Australia's controversial tennis star Bernard Tomic has been labelled as the 'king of the excuse' by his country's media after he pulled out of the Rome Masters citing illness and excessive heat.
Rafael Nadal rallied from a set down to ease past Fabio Fognini 4-6, 6-1, 6-2 in the Italian Open quarter-finals on Friday and set up a mouth-watering clash against long-time adversary Novak Djokovic for a place in Sunday's final. Djokovic plotted a similar path to the Spanish clay-court king when the Serb lost the first set against Japan's Kei Nishikori before recovering to win 2-6, 6-1, 6-3 and seal an open-era record 51st career meeting against Nadal.
Italy's Fabio Fognini said it was a 'strange feeling' playing a Davis Cup tie with no fans. Japan were also playing their tie against Ecuador in an empty stadium in Miki because of the coronavirus spread, which has played havoc with sporting fixtures across the world.
Leander Paes and Purav Raja, who are trying to establish as a pair on the ATP World Tour, progressed to the quarterfinals of the St Petersburg Open with a straight-set win over Fabio Fognini and James Cerretani.
India's Leander Paes and Purav Raja sailed into the men's doubles second round in the duo's first outing at a Grand Slam but Sania Mirza and Rohan Bopanna crashed out of their respective events in the US Open.
The world number one and defending champion was far from his best against the 29th-ranked Fabio Fognini, but still booked a fourth-round spot with a rip-roaring 6-2, 4-6, 6-1, 7-5 win on Friday.
Rafael Nadal, working his way back to top form after wrist problems last year, screamed with delight on reaching the Argentine Open semi-finals with a 6-1 6-1 rout of Federico Delbonis on Friday.
Dominic Thiem and Stefanos Tsitsipas won their respective singles matches before Roger Federer and Alexander Zverev teamed up in the doubles to beat Jack Sock and Denis Shapovalov
Britain's Andy Murray enjoyed a routine win over Argentina's Juan Monaco to ease into the third round of the tennis tournament at the Rio Games on Tuesday, while Spain's world number nine David Ferrer was knocked out.
Germany's Jan-Lennard Struff and Tim Puetz pulled off a shock 6-3, 6-4, 3-6, 6-7(4), 7-5 win over Spain's Feliciano Lopez and Marc Lopez to give Germany a 2-1 lead in their Davis Cup quarter-final on Saturday.
Images from Saturday's action at the Australian Open.
Images from the matches played on Day 7 at the Roland Garros on Saturday
It is not the first time Tomic has been in trouble for not trying.