Former champion Naomi Osaka was sent packing from Indian Wells after losing in straight sets to Colombia's Camila Osorio.
No. 2 seed Casper Ruud of Norway will take on unseeded Denis Shapovalov of Canada in the Dallas Open final on Sunday after both notched semi-final victories.
Novak Djokovic said a majority of players believe favouritism is at play in the tennis anti-doping system.
Rohan Bopanna and his Croatian partner Ivan Dodig suffered a shock loss to the pair of Francisco Cerundolo and Nicolas Jarry in the first round match of the China Open.
Rohan Bopanna and Nicolas Barrientos bowed out of the Australian Open men's doubles with an opening-round loss to the Spanish team of Pedro Martinez and Jaume Munar.
An off-colour Alcaraz lost 6-1, 7-5 to Norway's Casper Ruud in his opening match on Monday and the 21-year-old cancelled a public training session the following day.
Alexander Zverev into ATP Finals semis after straight sets win over Carlos Alcaraz
Alexander Zverev cruised past Frenchman Lucas Pouille in straight sets in the first round of the Australian Open on Sunday.
Jannik Sinner overpowered American Taylor Fritz in the final to become the first Italian man to win the US Open singles title.
Novak Djokovic is ready to challenge Jannik Sinner and Carlos Alcaraz at the Grand Slam stage when he returns to action at the Australian Open after an underwhelming campaign this year, the 24-times champion said.
AITA President Anil Jain, who was accused of using his position for personal gains, avoided facing a no-confidence motion from the state associations only after he agreed to step aside.
The ATP said that penalties and fines would apply for abuse or misuse of the coaching conditions and that the trial will be assessed at the end of the 2022 season for potential inclusion in future.
18-year-old Carlos Alcaraz of Spain became the youngest to clinch an ATP 500 title at the same event on Sunday when he defeated Diego Schwartzman in the final of the Rio Open.
'I think he's bringing a fresh look to my game and I'll be able to benefit from that, no doubt, on the court. But also that champion mentality he has, I'm sure we'll match very well.'
Learner Tien is the youngest American man to reach the third round of the Australian Open since an 18-year-old Pete Sampras in 1990.
Prajnesh Gunneswaran announces retirement from professional tennis
Novak Djokovic dug out a 6-7(4) 6-1 6-4 win over Czech Jakub Mensik on Friday to advance to the semi-finals of the Shanghai Masters, where he will face Taylor Fritz.
-French flair topped American firepower as Gael Monfils turned back the clock to dump fourth seed Taylor Fritz out of the Australian Open on Saturday and celebrate his place in the last 16 with a dance on court.
Davis Cup heavyweights Australia and the United States eased through the first qualifying round on Saturday but Britain were knocked out as Japan hit back from 2-1 down to win 3-2, while Denmark staged a dramatic comeback to overcome Serbia.
Novak Djokovic's bid to add a 100th singles title to his trophy cabinet on Sunday was dashed after he was beaten 7-6(4), 6-3 by world number one Jannik Sinner in the Shanghai Masters final on Sunday.
Sasikumar Mukund will aim for a winning return to the Davis Cup fold as India faces Togo in the World Group I Play-off.
Novak Djokovic's bid for a 100th ATP Tour title gained momentum on Thursday
Sinner gives the impression of a player with all the answers against whoever he comes up against, but the off-court questions he is likely to face about the doping case that surfaced in August might be harder to shrug off.
Daniil Medvedev destroyed his racket and a net camera in a mid-match meltdown as he survived a huge scare against Thai wildcard Kasidit Samrej.
Jannik Sinner retained his Australian Open title with an emphatic 6-3, 7-6(4), 6-3 win over Alexander Zverev on Sunday
Sinner remains the man to beat at Melbourne Park even as doping officials seek a two-year ban for the world number one for failing two drugs tests last March.
Former Indian tennis captain Anand Amritraj has criticized top players Sumit Nagal and Yuki Bhambri for not playing in the Davis Cup, stating that money should not be a factor when representing the country.
Sasikumar Mukund, who was banned by AITA on disciplinary grounds, is back as India's best-ranked player for the World Group I Play-off tie against Togo, starting on Saturday.
Retired tennis great Andy Murray has agreed to join Novak Djokovic's team and will coach him at the Australian Open next year, the Serbian 24-times Grand Slam champion said on Saturday.
Defending champion Jannik Sinner dismissed eighth seed Alex de Minaur 6-3, 6-2, 6-1 to reach the Australian Open semi-finals and extend the country's decades-long wait for another homegrown singles winner at the Grand Slam on Wednesday.
Greece's Tsitsipas battled back from 3-5 down in the third set to eliminate Medvedev with a 6-3, 6-7(11), 7-6(1) win to set up a showdown on Friday with Rublev for the Red Group's other semi-final spot.
Sumit Nagal attains career-high ATP ranking of 68
Djokovic saved three breakpoints in stifling conditions to go 5-4 up but lost the opening set in a tough tiebreak as Opelka cranked up his serve
'It's one of the most epic matches I have played on this court, on any court really.'
Djokovic has declined to disclose whether he is vaccinated, citing privacy.
The All India Tennis Association (AITA) selection panel picked a five-member squad in which Mukund will be the highest-ranked singles player at number 368.
The Croatian helped Djokovic claim nine of his 24 Grand Slam titles before leaving his team in March and on Friday was hired to coach world number five Rybakina for the 2025 season.
But Ruud, a semi-finalist last year, stamped his authority in the tiebreak and did not face a single break point in the match as he beat the Canadian for the second time this year.
The Indian jumped six places following his runner-up finish at the Perugia ATP Challenger tournament on Sunday.
Australia now have the opportunity to avenge last year's final defeat by Italy after world number one Jannik Sinner inspired the holders to a 2-1 victory over Argentina.