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.

Defending Australian Open champion Jannik Sinner has returned to the quarterfinals, navigating an illness and multiple delays during a 6-3, 3-6, 6-3, 6-2 win over No. 13 seed Holger Rune.

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.

Ailing defending champion Jannik Sinner admitted he was fortunate to survive a fourth-round battle with Holger Rune at the Australian Open.

Holger Rune is not playing his best tennis at the start of this season, but he is showing that determination that he has often lacked in the last two seasons. The young Danish talent reached the third round at the 2025 Australian Open by defeating Matteo Berrettini – semifinalist here in 2022 – after a very tough and exciting battle.

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

Melbourne: 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

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 victory over Holger Rune. The episode delayed

Grand Slam champ looks to move on from controversy after Australian reporter clarifies comments. Favorites Jannik Sinner, Iga Swiatek advance.

After telling fans on the weekend his "legs are back", Alex de Minaur proved it on his way to the Australian Open quarterfinals.

Jannik Sinner battled through illness and reached the quarter-finals of the Australian Open on Monday but the physical demands of Grand Slam tennis proved too much for French veteran Gael Monfils and American teenager Learner Tien.