Jannik Sinner typically has a relaxed, laid-back demeanour on the tennis court and it’s becoming a little clearer to understand why.

Defending champion Jannik Sinner’s consecutive-sets streak has ended in the second round of the Australian Open.

Jannik Sinner will part ways with veteran coach Darren Cahill after this season, the world's top-ranked tennis player revealed Thursday in Melbourne, where Sinner advanced to the third round of the Australian Open.

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

According to renowned sports scientist Dr. Ross Tucker, there’s a possibility that Jannik Sinner deliberately used the banned anabolic steroid clostebol.

World number one Jannik Sinner has now claimed 64 match wins at the majors, which moves him clear of Andreas Seppi (63) for the outright second most of any Italian in the Open Era, behind only Fabio F

Taylor Fritz, the highest-seeded American man at the Australian Open, needed only 82 minutes to defeat Cristian Garin on Thursday and advance to the third round.

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,

Defending champion Jannik Sinner beat 46th-ranked Marcos Giron of the U.S. 6-3, 6-4, 6-2 at the Australian Open on Saturday night, reaching the fourth round at Melbourne Park for the fourth time.

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

Defending champion Jannik Sinner lost his first set since October but recovered to beat Tristan Schoolkate and reach the third round of the Australian Open.