Defending champion Jannik Sinner is through to third round after Britain's Katie Boulter is beaten following Emma Raducanu's win at the Australian Open.

World No.1 and defending champion Jannik Sinner, Iga Swiatek, Elina Svitolina, Elena Rybakina and other big players will be in action on Day 9 of the hard court major at the Melbourne Park.

No. 19 seed Madison Keys scored the big upset on Day 9 of the Australian Open, defeating No. 6 Elena Rybakina 6-3, 1-6, 6-3 at Margaret Court Arena to advance to the tournament quarterfinals.

MELBOURNE - 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. Read more at straitstimes.

World No. 1 Jannik Sinner fought through blistering heat and an undisclosed ailment to defeat Holger Rune 6-3, 3-6, 6-3, 6-2 and advance to the quarterfinals of the Australian Open

Defending champion Jannik Sinner comes from a set down to win and Britain's Katie Boulter is beaten at the Australian Open.

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

The last of the Australian Open men's quarterfinals takes place in the wee hours of Wednesday morning, in the United States.

Defending Australian Open champion Jannik Sinner stumbled early Thursday ... beat Erika Andreeva (RUS) 6-2 6-3 Veronika Kudermetova (RUS) beat 22-Katie Boulter (GBR) 7-6(3) 2-6 6-2 28-Elina Svitolina (UKR) beat Caroline Dolehide (USA) 6-1 6-4 4-Jasmine ...

Elina Svitolina was 4-1 down before she went on a roll and took 11 of the next 12 games in a 6-4, 6-1 victory over Veronika Kudermetova ... either. Jannik Sinner gets past Holger Rune at ...

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.