In the Australian Open Round of 16 on Sunday, No. 1-ranked Jannik Sinner takes on No. 13 Holger Vitus Nodskov Rune.Sinner enters the Round of 16 after his three-set win on Saturday over Marcos

It's an up-and-down day for favorites and the husband-and-wife duo of Gaël Monfils and Elina Svitolina wo their singles matches.

Jannik Sinner was trying to "battle test" some new shots in his win over Marcos Giron because Carlos Alcaraz "still has an extra gear" - believes Jim Courier.

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

Meeting of former grand slam champions turned into an easy victory for the world No 2, who is vying for her first title in Melbourne.

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

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.

MELBOURNE: 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.

World number one Jannik Sinner has revealed details of his matchday preparations. The 23-year-old is already regarded as the best player currently playing in men’s tennis in the singles category.

The 2025 Australian Open runs from January 12-26. Tennis fans can follow Sports Illustrated's Serve on SI for all the most important news from the sport.