Djokovic was not happy with his coaching staff during the match. The Serb was playing in the first set of the match against Hungary.
The match was tied at 5-5 when Djokovic started to verbally attack his staff. The incident was captured on video and posted online by the BBC. The video shows the Serb shouting at the staff and then at the court. The clip was posted on the BBC's official website and can be viewed by clicking on the following link: http://www.bbc.co.uk/news/world/european-tourism/2013/01/26/3636/djokovic-and-fitness-coach-in-the-first-set-of-their-match-against-Hungary-at-Roland Garros.