World No. 1 Jannik Sinner braved a scary medical episode Monday in his 6-3, 3-6, 6-3, 6-2 win over Holger Rune in the fourth round of the 2025 Australian Open.

Jannik Sinner, the world No 1 and defending champion, looked to be heading out of the Australian Open until he was rescued by a controversial medical time-out.

Jannik Sinner is through to the Australian Open quarterfinals after a drama-filled fourth-round win over Holger Rune. World No. 1 Sinner won in four sets, 6-3. 3-6, 6-3, 6-2, but this did not tell the story of a contest defined by illness.

Jannik Sinner and Iga Swiatek were both subject to doping cases last year, which has overshadowed their participation at the Australian Open.

Jannik Sinner has achieved his goal by reaching the quarterfinals at the 2025 Australian Open. The world number 1 defeated a very dangerous opponent like Holger Rune in four sets, overcoming a malaise that hit him between the second and third sets and also forced him to leave the court for assistance.

The defending champion moved into the quarterfinals at Melbourne Park on Monday by eliminating the 13th-seeded Rune 6-3, 3-6, 6-3, 6-2.

As it is starting to come down to the wire, the top players have established themselves in Melbourne and are ready to compete in the quarterfinals of the 2025 A

The Australian Open quarterfinals will wrap up with defending champion Jannik Sinner of Italy against local hope Alex de Minaur in a night match on Rod Laver Arena

The Australian Open quarter-finals continue on Wednesday and top seed Jannik Sinner's task of defending his crown is not getting any easier. The Italian is recovering from an illness and will face Australia's last hope Alex De Minaur,

Jannik Sinner vs Alex de Minaur 2025 Australian Open match preview: TV & streaming details, ticket information, free tips &