Officials were forced to act quickly during Novak Djokovic's Miami Open semi-final match against Grigor Dimitrov as a "heckler" was removed from the stands after just three games. Dimitrov became aggravated at 1-1 in the first set and the chair umpire rushed down onto the court,

Novak Djokovic enjoyed a relaxed day at the office in the Miami Open semi-final. The six-time champion sailed past his great friend and last year's finalist Grigor Dimitrov 6-2, 6-3 in an hour and 10 minutes. Novak will chase his 100th ATP title against Jakub Mensik or Taylor Fritz.