It could be tempting to write off Novak Djokovic at this point, to think he might be closer than ever to being done competing for Grand Slam titles and closer than ever to retirement, where his greatest on-court rivals — Roger Federer,

Djokovic is only interested in tennis' biggest prizes. He still has the game to win them, but at age 37 his body is letting him down

Novak Djokovic pledged to continue his hunt for a record 25th Grand Slam title as he processed the disappointment of retiring from Friday's Australian Open semi-final due to a muscle injury.

Alexander Zverev chided the crowd after they booed Novak Djokovic for retiring due to injury after the first set in an Australian Open semifinal.

Djokovic, who retired due to injury after the first set, was booed by the crowd as he walked off Rod Laver Arena.

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.

Novak Djokovic has said he and Andy Murray will "cool off" before making a decision on whether they decide to continue to work together after the Serb's Australian Open exit.

Andy Murray has said that he and Novak Djokovic will hold talks about whether to extend their partnership beyond the Australian Open. Djokovic, a 24-time Grand Slam champion, brought Murray, a three-time major winner,