Djokovic retired hurt in his Australian Open semi-final against Daniil Medvedev after struggling with a muscle tear in his upper leg, having been in obvious discomfort throughout the opening set.

A leading tennis expert had pinpointed the benefits that Novak Djokovic was enjoying with Andy Murray as his coach before his shock retirement from the Australian Open on Friday. Djokovic called it quits after dropping the first set against Alexander Zverev,

Minnows Uruguay stunned rugby sevens powerhouses Fiji and New Zealand in two astonishing back-to-back upsets on a remarkable opening day of the world sevens series' Perth leg on Friday.