Jannik Sinner was trying to "battle test" some new shots in his win over Marcos Giron because Carlos Alcaraz "still has an extra gear" - believes Jim Courier.

Follow live text and radio commentary featuring Jack Draper against Carlos Alcaraz and Novak Djokovic in the Australian Open fourth round.

Aryna Sabalenka, Novak Djokovic, Coco Gauff and Carlos Alcaraz are the top seeds in action at Melbourne Park on Sunday. Rohan ...