LEONARDO DiCaprio enjoyed a late night at the U.S. Open tennis tournament on Wednesday (03Sep14) when he chose to stay up to watch Novak Djokovic defeat a weary Andy Murray.

The bearded movie star sat in a luxury box to watch the match of the day at USTA Billie Jean King National Tennis Center in New York.

DiCaprio was joined by his mum Irmelin.

The three-hour-plus match ended after 1am local time and now number one seed Djokovic will play Japanese tennis sensation Kei Nishikori in the semi-finals this weekend (06-07Sep14).