Cahill took to his Instagram to reveal that he will be taking a 12-month break for personal reasons.
Sinner's coach Darren Cahill said the Australian Open and Wimbledon champion was suffering from a virus.
Jannik Sinner battled cramp in extreme heat in a gutsy win over American Eliot Spizzirri to enter the fourth round of the Australian Open on Saturday
Jannik Sinner's tennis may be making headlines, but his off-court life is drawing just as much curiosity especially after his ATP Finals win, where a smiling Laila Hasanovic was the first person he hugged.
'It feels emotional because only me and the people who are close to me know exactly what we have been through on and off the court, and it has been everything except easy.'
Carlos Alcaraz said he could hold his head high despite being unseated from his Wimbledon throne by Jannik Sinner on Sunday and the Spaniard praised their hot rivalry for being several notches higher than the others on the men's tour.
The American has already sent a warning to Lleyton Hewitt, beating Frenchman Sebastien Grosjean 6-2, 6-3 to win the Kooyong Classic
Jannik Sinner was not about to announce the end of the "Big Three" after his breakthrough Grand Slam triumph at the Australian Open but the 22-year-old Italian does believe tennis needs a fresh generation of champions.
'I guess only the top players' images matter. I guess only the independent tribunal's opinion on the top players is taken as sound and right.'
Halep reached the Melbourne title match in 2018 but lost a three-set thriller to Caroline Wozniacki. It was the Romanian's third defeat in three Grand Slam finals.
Screaming at their box, hitting aces, all the ways players want to raise money to contribute to the relief work for the bushfires.
'Now, because of these mistakes, I'm not feeling that confident to continue with them. I was struggling a lot in the last months. I was waiting for the result. The only thing I need right now is some clean air.'
Darren Cahill is currently coaching Simona Halep on the telephone or via video link and has asked her to adopt the mindset of an Olympic athlete during an enforced layoff that could extend to the end of the year.
He may have entered the semifinal as the underdog, but Jannik Sinner's stunning victory over overwhelming favourite Novak Djokovic left the Melbourne crowd shocked.
The ITF has made a range of learning resources on its academy platform available for free during the shutdown while the ATP Tour announced an initiative this week that will give fans the chance to bid for sessions with top coaches. Funds raised from the sessions will go to the tour's Coaches Committee to support its members.
'I'm happy to be part of this Italian movement. People, they start to play tennis now more and more, which is great to see. I think that's the most important.'
Ivan Lendl could be the missing piece to Andy Murray's Grand Slam puzzle, says the Briton's former-coach Darren Cahill, who helped pick his new mentor.
The defending Australian Open champion said he wants to honour a commitment he made to speak to Hookes's team.
Jannik Sinner has sprinted past opponents at the Australian Open in his quest for a maiden Grand Slam but could end up running a marathon in the final against Daniil Medvedev on Sunday, when Melbourne Park will crown a new king.
No 'triple bagel' but Djokovic thumps Mannarino to reach quarters
Venus Williams beat top seed Angelique Kerber on Wednesday to advance to a Miami Open semi-final against Britain's Johanna Konta.
Grigor Dimitrov dispatched American 10th seed Frances Tiafoe in straight sets with a convincing 6-2 6-3 6-2 victory on Sunday.
'It's very emotional. I've been waiting for this moment since I was 14'
The claycourt Grand Slam at Roland Garros would now take place from Sept. 20-Oct. 4, dates that clash with several other events. With players already counting the cost of the tennis shutdown, the decision did not go down well.
The unseeded Ostapenko, 20, downed Romanian third seed Simona Halep 4-6, 6-4, 6-3 in the final, hitting a staggering 54 winners and taking her tournament tally to 299.
Halep has struggled for form and fitness since her first-round defeat at the US Open last August and came to Australia on a five-match losing streak and without a coach after long-serving Darren Cahill left for "family reasons".
The ATP Tour got on board and last month fans were able to bid for private sessions with celebrated tennis coaches on-site during tournaments in 2021.
New York Governor Andrew Cuomo said the USTA would take "extraordinary precautions" to protect players, including robust testing, additional cleaning, extra locker room space and dedicated accommodation.
Halep's near-flawless display at the All England Club marked a spectacular return to form after her world ranking dropped from first to seventh between mid-January and July.
'Remarkable discipline for training, competition, sacrifice, perfection, a little crazy but a legend of a bloke. Bravo Andy'.
Simona Halep's brave Australian Open campaign but the exhausted Romanian hit a dead end in the final as she crumbled in a thriller against Caroline Wozniacki.
Defending champion Novak Djokovic's preparations for Wimbledon have been laid back in the extreme.
New coach Rainer Schuettler's experience as a former player at the top level has been invaluable for Wimbledon champion Angelique Kerber and the world number two believes her poor end to last season is truly behind her.
Germany's Angelique Kerber breezed past American Madison Keys in straight sets to enter the Australian Open semi-finals in Melbourne on Wednesday. The 2016 champion easily won 6-1, 6-2 in just 51 minutes.
Top seed Serena Williams shook off a spirited attempt by Agnieszka Radwanska and moved into the final of the Rogers Cup with a 7-6(3), 6-4 victory on Saturday and will meet Romania's Sorana Cirstea, whose surprising run continued when she beat China's Li Na 6-1, 7-6(5).
Novak Djokovic maintained his unbeaten record against Frenchman Gael Monfils with a 6-3, 6-2 win in the semi-finals of the Rogers Cup in Toronto on Saturday, while Japan's Kei Nishikori also reached the final after beating Swiss second seed Stan Wawrinka.
The yellowing obituaries are looking premature as serve-and-volley tennis creeps, with a few tweaks, towards a renaissance of sorts.
Garbine Muguruza stormed back into the Grand Slam big time with a 7-5, 6-3 win over Russian Anastasia Pavlyuchenkova to reach her first Australian Open semi-final. Fourth seed Simona Halep advanced to her second Australian Open semi-final with a 6-1, 6-1 demolition of Estonia's Anett Kontaveit in just 53 minutes on Rod Laver Arena.
Summary of sports events and persons who made news on Monday
Novak Djokovic and Rogerer Federer loom over Melbourne Park for the year's opening Grand Slam as favourites for the Australian Open as questions remain as to whether one of Generation Next could finally end their stranglehold.
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