Aryna Sabalenka and Novak Djokovic overcame early tests to reach the U.S. Open second round before the Grand Slam descended into chaos late on Sunday when Daniil Medvedev launched a tirade at the match umpire and fans disrupted his opponent's service game.

Aryna Sabalenka launched the defence of her US Open crown with victory Sunday while Novak Djokovic made a successful start to his latest bid for a record 25th Grand Slam

Aryna Sabalenka commenced her US Open title defence successfully, while Novak Djokovic progressed towards a potential record 25th Grand Slam. Alexandr