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.

Sinner's remarkable on-court ability to block out any distraction from his mission has been on full display as he seeks to defend his Melbourne title.

Imperious Iga Swiatek swept into an Australian Open semi-final against Madison Keys on Wednesday while Jannik Sinner's powers of recovery will be tested to the limit when he faces home hope Alex de Minaur.

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

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 defending champion quickly dismissed the home favorite, entertaining the crowd with a lengthy post-match interview before taking on Ben Shelton.

Lorenzo Sonego will take on American Ben Shelton in the other men’s quarter-final on Jan 22. Read more at straitstimes.com.

As much as any top player, Sinner has been able to expose De Minaur’s lack of first-strike weaponry. The Aussie’s strength is his scrambling and counterpunching, but Sinner serves too well, hits too hard, places the ball too precisely for his defense to be effective. De Minaur hasn’t found a way to hurt, rattle, of disrupt him.

Madison Keys completed a comeback win over Elina Svitolina in the Women's singles quarterfinal to go through to the semi-final. Iga Swiatek will face off against Emma Navarro next, with the likes of Jannik Sinner,

Australian Open resumes on Wednesday, with top seed and defending champion Jannik Sinner leading the action in the second set of quarter-finals in Melbourne.