The quarterfinals are underway at Melbourne Park, as rumours abound about Jannik Sinner's health ahead of his clash with Alex de Minaur. Follow live.

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

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 American rallied from a set down to reach the last four in Melbourne for the third time, and will face No. 2 seed Iga Swiatek next.

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

The Australian Open quarter-finals are heating up as Jannik Sinner, battling illness, faces Australia's Alex De Minaur. Meanwhile, Iga Swiatek enters her match free of doping appeals. Experienced players Madison Keys and Elina Svitolina also showcase their adaptability in women's top matches.

The Australian Open 2025 semi-finals are set, with Jannik Sinner and Iga Swiatek delivering commanding performances to secure their spots. Sinner overpowered Alex de Minaur in straight sets, while Swiatek continued her dominant run with another clinical win.

Alex de Minaur is through to the quarterfinals of the Australian Open for the first time, defeating American giant-killer Alex Michelsen.

Iga Swiatek is dominating her Australian Open opponents the way no one has at Melbourne Park since Maria Sharapova in 2013.

That man was Novak Djokovic, the 10-time Australian Open champion, who got lucky to snare a set. They met only once more last year - the Shanghai final - and Sinner did the legend over again. That is the quality of the player de Minaur was trying to take down.

Keys raised her game, though, breaking Svitolina in both the final sets while staying rock-solid on serve. Shelton, the 21st seed, is the last American in the men's singles draw, having carried on after the third round demise of US Open runner-up Taylor Fritz and the quarterfinal exit of 12th seed Tommy Paul.