John McEnroe famously screamed 'You cannot be serious!' 40 years ago.
John McEnroe is known as a tennis legend, not only for his championship-laden career, but also his controversial antics on the court. Never afraid to inform the umpire that he felt they had made a wrong call, and he provided arguably the most memorable moment of his career and possibly in the sport itself. McEnroe had already become well known for his short temper and been nicknamed 'Superbrat' by the press when he faced Tom Gullikson in the first round of the 1981 Wimbledon championship.
He became irate when umpire Edward James ruled that his serve went out, initially barking "Excuse me?" before launching into a tirade after James explained his decision.
"You can't be serious man, you cannot be serious!" he screamed to the shock of the watching crowd.