Tennis player John McEnroe was known for losing his temper during matches. In 1981, he was fined for calling umpire Ted James, "the pits of the world” and swearing at referee Fred Hoyles. He made the phrase “you cannot be serious” famous, which he shouted at umpires during many matches. He was fined another time for slamming his racquet into a juice cart and yelling at an umpire. The list of fines and suspensions goes on and on as McEnroe was a pro at letting his temper fly.
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