When Djokovic made the worst mistake of his career

Djokovic lost it at the US Open, but this wasn't the only time this happened.
He’s one of the greatest tennis players in history but also one of the most controversial. Djokovic's temperament and strong opinions have put him at the center of the discussion more than once. However, on one occasion he broke all the rules. His anger on the court led him to commit an unforgivable act that cost him dearly.
Subscribe and keep step with sporting legends every day on #Cracks! bit.ly/yt-thecracks
You can find more #Positive videos on our Facebook page bit.ly/fb-thecracks