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.

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.

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.

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.

Earlier in the day, Iga Swiatek cruised past Emma Navarro 6-1, 6-2 in their Women’s Singles quarter-final while Madison Keys secured a surprising 3-6, 6-3, 6-4 victory over Elina Svitolina to set up a meeting with Swiatek tomorrow.

Defending champion Jannik Sinner raced into the Australian Open semi-finals on Wednesday in imperious fashion after Iga Swiatek was equally ruthless to close

Ben Shelton and Madison Keys became the first American man and woman to reach the Australian Open semifinals in the same year since 2009, with respective quarterfinal triumphs Wednesday in Melbourne.

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

World tennis No.1 Jannik Sinner is reportedly seriously ill with pneumonia, ahead of his crucial clash against Alex de Minaur.

American Danielle Collins is out of the Australian Open following a straight-sets defeat by fellow countrywoman Madison Keys.

Jannik Sinner, Iga Swiatek and Elena Rybakina are some of the prominent players who will be in action on the ninth day in Melbourne.