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

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 has played down an illness which left him “dizzy” and seeking treatment as his Australian Open title defence came under significant threat on Monday.

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.

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.

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.

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.

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

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.