'You can't be serious!' Top six on-court tennis controversies
Viktor Troicki, Wimbledon 2016
Serbia's Viktor Troicki was furious at Wimbledon 2016 when the umpire judged opponent Albert Ramos' serve to be in, giving the Spaniard match point at 40-30. But Troicki, absolutely convinced the ball was out, screamed "What!?" at the umpire, before launching into a rage, calling the umpire "an idiot, the worst in the world! The worst ever! You didn't see anything today! You made 30 mistakes!"