Katie Boulter had an adorable message for a fellow tennis power couple after they won matches on the same day at the Australian Open. Gael Monfils and Elina Svitolina both upset the No. 4 seeds in the men’s and women’s singles draws in back-to-back matches on Margaret Court Arena.

Pat Rafter has warned Alex de Minaur to batten down the hatches as he strives to enter uncharted waters at the Australian Open.

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.

Alex de Minaur is facing off with top seed and defending champion Jannik Sinner for a spot in the Australian Open semifinals against American Ben Shelton. Follow live.

Jannik Sinner 6-3 Alex de Minaur Ben Shelton beats Lorenzo Sonego 6-4 7-5 4-6 7-6 (7-4) to reach semi-finals Iga Swiatek drops just three games on way to last four Swiatek will play Madison Keys, who came from behind to beat Elina Svitolina Alfie Hewett through to wheelchair singles semi-finals Use audio icon for BBC Radio 5 Sports Extra commentary (UK only) Joe Rindl,

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.

MELBOURNE - The Australian Open quarter-finals continue on Wednesday and top seed Jannik Sinner's task of defending his crown is not getting any easier. The Italian is recovering from an illness and will face Australia's last hope Alex De Minaur,

Jannik Sinner continued his quest for consecutive Australian Open titles with a clinical deconstruction of Alex De Minaur in the last of the men’s singles quarter-finals. Rarely in professional sport is one person so visibly better than their opponent in ever aspect of play than this.

Ben Shelton, 22, has slowly been rising up the rankings - having reached the quarter-finals at Melbourne Park in 2023 and the US Open semi-finals last year. He comes from a properly tennis family. His Dad Bryan Shleton won two ATP titles, while his mum Lisa Witsken Shelton boasts a fine junior record.

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