Novak Djokovic

Novak Djokovic put on one of his worst performances on Sunday, in his first match since accidentally getting knocked on the head by a water bottle.

The 24-time major champion said he was 'shocked' at his own level 'in a bad way' after he was defeated by Italian fourth seed Jannik Sinner.

Ali Hassan from Penrith defeated the Wimbledon champ when the pair met at a European tournament as teenagers.