World no. 1 Jannik Sinner has survived a mid-match health scare to keep his title defence alive at Melbourne Park. Jannik Sinner looked sick and sorry, with his Australian Open title defence under siege.

The screw holding the net in place at the Australian Open’s main stadium has been jarred loose during defending champion Jannik Sinner’s fourth-round match against Holger Rune.

Jannik Sinner has kept his Australian Open title defence on track with a hard-fought victory over Denamrk's Holger Rune.

The Day 9 of the Australian Open 2025 is underway at Melbourne Park as it promises to deliver some fantastic and exciting tennis. Jannik Sinner will battle it out against Holger Rune, while Gael Monfils will take on Ben Shelton.

They also have a dead-even head-to-head record. Keys won their first two matches, and Rybakina came back to win the next two, including their only meeting of 2024, on hard courts in Miami. Keys has won eight straight matches in Adelaide and Melbourne, while Rybakina, with new coach Goran Ivanisevic, hasn’t dropped a set this week.

MELBOURNE - Jannik Sinner will face his trickiest test yet at the Australian Open when the defending champion battles Dane Holger Rune in the fourth round on Monday, while five-times Grand Slam winner Iga Swiatek will be the heavy favourite against lucky loser Eva Lys.

First came the medical timeouts, one each for Jannik Sinner and Holger Rune with the temperature above 90 degrees Fahrenheit (32 Celsius) at the Australian Open. Then came the unusual sight of a 20-minute delay because the net at Rod Laver Arena detached from the court after being hit by a big Sinner serve.

Jannik Sinner faces Holger Rune at the 2025 Australian Open. Our Australian Open odds series has our Sinner-Rune prediction, odds and pick. Find out how to watch Sinner Rune. Jannik Sinner continues to advance at this Australian Open,

Iga Swiatek will also be in action later on as she takes on Germany's E. Lys in the next round later in the day.

Jannik Sinner will face his trickiest test yet at the Australian Open when the defending champion battles Dane Holger Rune in the fourth round on Monday, while five-times Grand Slam winner Iga Swiatek will be the heavy favourite against lucky loser Eva Lys.

The former world No. 4 is into the second week of a hard-court major for the first time since 2023, rallying from two sets to one down to defeat Miomir Kecmanovic on Margaret Court Arena.