Djokovic's family said his release was the 'biggest victory of his life'.
'I'm disappointed and sad because after a good start to the season I was coming to a very important part of the year with very good feelings and good results.'
Britain's Formula One world champion Lewis Hamilton claimed the inaugural Athlete Advocate of the Year Award for his involvement in the fight against racism.
IMAGES from the English Premier League matches played on Saturday.
Frenchman Adrian Mannarino also quit at two sets apiece against eight-times champion Roger Federer after sliding over on Centre Court and injuring his knee.
Rafael Nadal said he was lucky to be part of an era of tennis that included Roger Federer and Novak Djokovic after the Spaniard won a men's record 21st Grand Slam title at the Australian Open to move one ahead of his two great rivals.
'I really look forward to going to Paris, to fight for the Grand Slam, and I am really looking forward to show my great level in a Grand Slam, too.'
Federer, Nadal and Djokovic had made it near impossible for their peers to live, and thrive, amongst them. But the coming generation, which hasn't been as scarred by defeat at the hands of the Big 3, may make tennis unpredictable again.