Follow live text and radio commentary as Alex de Minaur plays Alex Michelsen in the Australian Open fourth round.

Defending champion and No. 1 seed Jannik Sinner easily dispatches host country's last hope; Ben Shelton takes on-court ...

Follow the quarter-finals action live as Madison Keys does battle with Elina Svitolina, Iga Swiatek faces Emma Navarro and Ben Shelton plays Lorenzo Sonego.

de Minaur follows the quarterfinal between Ben ... Sonego will go up against No. 21 Ben Shelton, who advanced when 38-year-old Gael Monfils of France quit because of an injury early in the fourth ...

Swiatek, Svitolina, Keys, Sonego and Shelton also make it through to the last-eight stage on a hot day in Melbourne.

MELBOURNE – Jannik Sinner battled dizzy spells on Jan 20 to reach an Australian Open quarter-final against Alex de Minaur ... an exhausted Gael Monfils of France called it quits with Shelton ...

Ben Shelton, right, of the U.S. shakes hands with Gael Monfils of France after Monfils ... tennis championship in Melbourne, Australia. Alex de Minaur of Australia plays a forehand return to ...

Sonego will play 21st seed Ben Shelton next after the American's fourth-round opponent, Frenchman Gael Monfils, retired while trailing 7-6 (7-3) 6-7 (3-7) 7-6 (7-2) 1-0. Alex de Minaur speaking on ...

Jannik Sinner brushed off concerns about his health with a brutal destruction of home hope Alex de Minaur in the quarter ... playing 38-year-old Frenchman Gael Monfils in the fourth round.

Jannik Sinner battled through illness and reached the quarter-finals of the Australian Open on Monday but the physical ...