New York | Novak Djokovic, the top men's player in a sport with its share of meltdowns and misbehaviour, became the first No. 1 disqualified from a Grand Slam singles tournament after he inadvertently struck a line judge with a ball hit in frustration at the US Open on Sunday (Monday AEST).

Mr Djokovic's sudden ouster from the country's premier tennis tournament immediately made a bizarre US Open even more strange. It has been staged during the coronavirus pandemic, with players sparring with local health officials over contact tracing and the top women's doubles team abruptly disqualified on Saturday.