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 bizarre 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 defeated Holger Rune in four sets at the Australian Open after experiencing a health scare during the match.

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 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,

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.

Jannik Sinner and Holger Rune thrilled fans on Sunday with what will likely go down as the best point of the 2025 Australian Open. Sinner, the World No. 1

The World No. 1, despite feeling unwell in sweltering conditions, kept up his title defense with a four-set triumph.

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.

Sinner was joined in the quarter-finals by countryman Lorenzo Sonego, who is through to this stage at a grand slam for the first time after ending the run of 19-year-old American Learner Tien with a 6-3 6-2 3-6 6-1 victory.

Jannik Sinner has battled through a worrying bout of illness to keep his hunt for a second successive Australian Open title alive.

The most interesting match on Monday 20 January at the 2025 Australian Open is certainly the one between Jannik Sinner and Holger Rune. These two players have always played very spectacular and balanced matches against each other, with the h2h balance in perfect parity at 2-2.