Frenchman Mouratoglou said Williams had been able to recharge during the break and that her appetite for titles had not waned.
Earlier, Ukraine took a 2-0 lead over Japan as world number five Elina Svitolina took the first point of the Billie Jean King Cup era.
Not since Stan Wawrinka's 2016 US Open triumph has a Grand Slam been won by someone other than the 'Big Three', winners of the last 13 major titles.
Sacked Real Madrid coach Rafa Benitez says it was "an honour and privilege" to lead the club he has always supported and has sent a "good luck" message to his successor, former France great Zinedine Zidane.
Under-fire Manchester United boss Jose Mourinho has been priced odds-on to be the first Premier League manager to leave his job this season.
IMAGES from the Australian Open matches played on Wednesday.
The Austrian spent four days in bed with a virus after pulling out of a tournament in Doha last week.
The Serbian won 6-2, 6-3, 6-3 to claim his 15th Grand Slam title.
Delighted world number one Novak Djokovic said he was back to his best after winning a third Madrid Open title on Sunday, defeating Stefanos Tsitsipas 6-3, 6-4.
Novak Djokovic's intentions in organising the ill-fated Adria Tour were good but the world number one could have applied a bit more common sense to how the exhibition event was run, former ATP players' council head Vijay Amritraj said. The Serbian has faced fierce criticism after he, Grigor Dimitrov, Borna Coric and Viktor Troicki contracted COVID-19 following the charity event in Serbia and Croatia.
Images from Sunday's action in the Premier League.
No complaints but quarantine differentials were a mistake: Zverev
Tennis's flagship team events the Davis Cup and Fed Cup Finals have been postponed until 2021 because of the COVID-19 pandemic, the International Tennis Federation (ITF) said on Friday. Professional tennis has been suspended since March and will not return until August.
Will it be Rafa versus Djoko in Sunday's final?
Spaniard Benitez left Napoli at the end of the season and takes over from Italian Carlo Ancelotti at the Bernabeu.
Rafa Nadal continued his sizzling hardcourt form beating John Isner 7-6 (8), 7-6 (3) in the final of the Western and Southern Open on Sunday, setting up the Spaniard as the red-hot favourite heading into the U.S. Open.
Roger Federer is looking forward to facing his great rival for the French Open crown a year after Rafael Nadal missed their rendezvous in the final. With usual contenders Nikolay Davydenko of Russia and Argentine Juan Martin Del Potro having pulled out injured, the road looks clearer for another Roger versus Rafa classic.
Liverpool have assured Rafa Benitez that his job is secure despite the club joining the Champions League also-rans.
Images from Day 3 of the French Open matches played at Roland Garros on Tuesday
But after those events, Federer will take a training break, the paper reported.
International Tennis Hall of Fame inductee Andy Roddick said on Saturday he was honoured to have played in the era of the Big Four, but also acknowledged that they caused him no end of frustration during his career.
IMAGES from Day 1 of the Wimbledon Championships played on Monday.
Images from Day 9 of the 2022 Australian Open, at Melbourne Park, on Tuesday.
'Rafa is okay, nothing serious. He did not have any stomach upset. He was playing in the US Open with the same wrist issue. It is getting better and better but still it is sometimes painful. We still have two days of competition. So he might play one of these days'
Liverpool FC manager Rafa Benitez has said no amount of money could tempt him into selling star striker Fernando Torres.
The Swedish former world number one is in the French capital soaking up all the action as a presenter for broadcaster Eurosport's daily flagship show 'Game, Set and Mats'.
Andy Murray felt 'gutted' for Rafa Nadal when the Spaniard limped out of the Australian Open with a knee injury but said he deserved his place in the semi-finals after putting on a dazzling display.
The tennis star also opened the doors of his Rafael Nadal Academy to those who were affected by the storm.
Tennis great Billie Jean King says the financial fallout from the coronavirus shutdown has exposed the unfairness of the sport and that it is important for the top players to lead the cause for change. The tennis season was suspended in March due to the COVID-19 pandemic and the shutdown will continue at least until mid-July, depriving lower-level players, who depend solely on tournament winnings, of the chance to earn a living.
Novak Djokovic deserves a "little star" next to his name for a spectacular 2015 season that saw him win three grand slams among his 11 titles but the men's game is not simply a matter of the Serb versus the rest, Roger Federer said.
Rafael Nadal has been left out of Spain's Davis Cup squad for their World Group first-round match against Croatia this weekend due to fatigue.
Spaniard Rafa Nadal won his 67th career title with a 7-5, 7-5 victory against dangerous Italian Fabio Fognini in the final of the Hamburg Open on Sunday.
Images from Day 3 of the 2022 Australian Open in Melbourne on Wednesday.
Medvedev became only the fourth player in ATP history to beat the world's top three at the same tournament.
Having seen the domestic league and cup double go to Porto last term, Benfica missed a string of chances against PAOK in a one-sided first half as they enjoyed 72% of possession.
Kyrgios out of Australian ATP Cup team as world ranking slips.
The 14-times Grand Slam champion will surpass Roger Federer as world number two when the next edition of the ATP rankings are released on Monday.
'I physically need to get a little better and hopefully over time I get a little bit faster... I think I will'
"But if you need a reminder of who he is, just look at his career stats and grand slams that he won."
Until Sunday, Stan Wawrinka had an unblemished record in grand slam finals -- but then he had never faced Rafa Nadal in the Spaniard's favourite arena, Court Philippe Chatrier at the French Open.
