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 has ended in the second round of the Australian Open.

But having stunned ninth seed Andrey Rublev in straight sets in the first round, the teenager went down fighting, Italy’s Lorenzo Sonego pulling through 6-7 (6-8), 6-3, 6-1, 3-6, 6-3 to disappoint the vocal Brazilian fans.

In a match slated for Tuesday, Tristan Schoolkate (No. 173 in rankings) will meet Jannik Sinner (No. 1) in the Round of 64 at the Australian Open.Sinner’s last competition was a win, 6-2,

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

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.

Jannik Sinner has admitted he was 'struggling' to cope with the breezy conditions at the Australian Open as he beat Tristan Schoolkate in four sets on Thursday morning. The world No 1 is hoping to defend his title Down Under,