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,

Novak Djokovic and Andy Murray maybe didn't kick off their partnership with a triumph but Nick Kyrgios still thinks that the Briton did "an incredible job" in his coaching debut.

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.