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 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.

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.

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,

Defending champion Jannik Sinner and first-time hopeful Iga Swiatek delivered dominant performances on Wednesday, advancing to the Australian

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.

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

American tennis player Ben Shelton criticized on Wednesday some of the questions and comments made by post-match TV interviewers at the Australian Open.

Iga Swiatek booked her second Australian Open semi-final with another spectacular display on Wednesday while Americans reached the last four of the men's and women's singles at Melbourne Park for the first time in 16 years.

Ben Shelton has never been to a Grand Slam final, but he'll have to beat the No. 1 tennis player in the world to get there.