Five-time champion Novak Djokovic crashed out in his Indian Wells ATP Masters opener on Saturday, just the latest proof that "things are different" now for the 24-time Grand Slam champion.

The 24-time Grand Slam winner, who retired from his last four match at Melbourne Park in January due to the injury and lost his opener at the Qatar Open last month, also said he was reaping the rewards of his work with coach Andy Murray.

The outcome not only propelled them into the semifinals of the 21-team tournament but also confirmed their qualification as one of the top four teams for the final round in the Czech Republic, set to take place from August 4 to 9.

Mirra Andreeva became the youngest player to win a WTA 1000 title when the 17-year-old beat Clara Tauson 7-6(1) 6-1 in the Dubai Tennis Championships final on Saturday.

The match was briefly halted after Raducanu spoke with the umpire, who quickly contacted tournament organisers. The 22-year-old stood behind the official's chair as the spectator was escorted away.

Novak Djokovic's comeback came to a crashing halt on Tuesday as he lost 7-6 (7/4), 6-2 to Matteo Berrettini in the second round of the Qatar Open.

World number one Sinner agreed to a three-month ban on Saturday, admitting "partial responsibility" for mistakes by his team which led to him twice testing positive for traces of clostebol in March last year.

Jannik Sinner accepted on Saturday a three-month ban from tennis after the world number one admitted team mistakes led to him twice testing positive for traces of banned substance clostebol last year.

Djokovic's bid for a record-breaking 25th Grand Slam title at the Australian Open was ended when he was forced to retire injured after dropping the opening set against Alexander Zverev in the semi-finals.

World number three Alcaraz had too much weight of shot off both flanks for his opponent, who retrieved valiantly but lacked the weapons to topple the top seed.

Former world number one and two-time Grand Slam winner Simona Halep announced her retirement from professional tennis on Tuesday after losing in the first round at her home event in Cluj.

Two-time Wimbledon champion Petra Kvitova will return to action this month after a 15-month maternity break, with the Czech set to play in three tournaments in the United States.

"He has lost only four or five matches in the past year, so it's crazy. I know people say who's better out of us. They say Jannik is better or some say me. It's all discussion."

World number one Jannik Sinner will not defend his ATP 500 title in Rotterdam as the Italian's "body needs time to rest" after winning the Australian Open, tournament organisers announced Monday.

Double Australian Open champion Jannik Sinner set his sights on mastering clay and grass courts to make himself a complete player after the Italian claimed his third hardcourt Grand Slam title on Sunday.

The 23-year-old came through a tense battle between the world's top two players 6-3, 7-6 (7/4), 6-3 on Rod Laver Arena, raising his arms in the air and looking to the sky in celebration.

The victory earned the Italian world number one his third Grand Slam crown.

The Australian Open, the first Grand Slam of the year, ends on Sunday when defending champion Jannik Sinner faces Alexander Zverev for the men's title. AFP looks back on five memorable storylines from the past two weeks in Melbourne:

The former world number one responded on Saturday, posting a photo of an MRI taken of his left hamstring on the social media platform X with the caption: "Thought I'd leave this here for all the sports injury 'experts' out there."

It is Keys's first major title, having reached a second Grand Slam final eight years after her first in New York. She lost on that occasion to Sloane Stephens