Defending champ Jannik Sinner drops set for first time since October, but rallies for win; American Danielle Collins plays villain while advancing.

Defending champion Jannik Sinner's consecutive-sets streak ended in the second round of the Australian Open on Thursday night, but he advanced with a 4-6, 6-4, 6-1, 6-3 victory over wild-card entry Tristan Schoolkate.

Day 5 of the Australian Open was a good day for the higher seeds in the men's and women's draws, with big names advancing to the third round. Men's No. 1 seed Jannik Sinner stumbled early against Australian Tristan Schoolkate by dropping the opening set 4-6.

Jannik Sinner has started his Australian Open title defense with a challenging win over No. 35-ranked Nicolas Jarry.

Jannik Sinner will make his official debut in 2025 at the Australian Open tomorrow. The world number 1 will face the Chilean ace Nicolas Jarry in the first round, in a match that could hide some pitfalls. However, there is no doubt that the Italian champion is the top favorite to win at Melbourne Park this year and confirm the title won in 2024.

After his second round victory at the 2025 Australian Open, defending champion Jannik Sinner has added another record to his already impressive resume.

When Carlos Alcaraz is on court for a training session, perhaps working on his newly revamped service motion, he’s doing so to buttress a game already good enough to claim four Grand Slam titles

World number one Jannik Sinner dropped a set for the first time in 14 matches on Thursday before surging back to keep his Australian Open title defense on track. The Italian top seed had no answers at the start against Australian wildcard Tristan Schoolkate,

Jannik Sinner has announced that he will part ways with his coach Darren Cahill at the end of the season. The Australian, who joined Sinner's team in July 2022, will conclude the 2025 campaign before stepping back from full-time tennis.

Aces: Has made the final at Melbourne Park in three of the past four years but has yet to claim the championship. In two of those defeats in a title match, took a two-set lead before losing in five (to Jannik Sinner last year and to Rafael Nadal in 2022). ... Is 1-5 overall in Grand Slam finals.