Defending champion Jannik Sinner has moved into the quarterfinals at the Australian Open after beating Holger Rune during a match slowed down by medical timeouts for each player and a delay because the net got knocked loose.

Defending champion Jannik Sinner raced into the Australian Open semi-finals on Wednesday in imperious fashion after Iga Swiatek was equally ruthless to close on a first Melbourne crown. The other semi-final is between 10-time Australian Open champion Novak Djokovic and world number two Alexander Zverev,

Defending champion and top seed Jannik Sinner overcame a debilitating medical episode as well as Dane Holger Rune to reach the quarter-finals of the Australian Open for the third time with a 6-3 3-6 6-3 6-2 victory on Monday.

Iga Swiatek will look to continue her march to a maiden Australian Open title on Wednesday while Jannik Sinner's powers of recovery will be tested in a quarter-final against home hope Alex de Minaur.

Jannik Sinner and Iga Swiatek progress to the quarter-finals of the Australian Open amid challenges. Sinner battled illness to defeat Dane Holger Rune. Meanwhile, Swiatek continued her quest for a maiden win by beating Eva Lys.

Jannik Sinner fought through illness to reach the Australian Open's quarter-finals, while Gael Monfils retired due to a back injury. Iga Swiatek continued her impressive form, defeating Eva Lys. Elina Svitolina uplifted Ukraine with her win,

Novak Djokovic was at the centre of another Australian Open row on Monday while defending champion Jannik Sinner needed medical attention in fierce heat to battle into the quarter-finals.

Novak Djokovic was at the centre of another Australian Open row on Monday while Jannik Sinner needed medical attention in fierce heat to battle into the quarter-finals and Iga Swiatek

Jannik Sinner battled through illness to reach the quarter-finals of the Australian Open on Monday as his Italian compatriot Lorenzo Sonego ended teenager Learner Tien's fairytale run.

Elina Svitolina of Ukraine gestures during her fourth round ... (AP Photo/Manish Swarup) Jannik Sinner of Italy reacts during his fourth round match against Holger Rune of Denmark at the ...

World No.1 Jannik Sinner fought through a rather tough match against rising star Ben Shelton, winning 7-6, 6-2, 6-2 in the Australian Open semi-finals.