John McEnroe, Tennis' Bad Boy: The Jerk Who Made Us Watch

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Left: McEnroe invites the camera to talk to the hand. Right: McEnroe yells during a match at the 1984 French Open. Sources: IMDB; Gilbert Iundt; Jean-Yves Ruszniewski/TempSport/Corbis/VCG via Getty Images

In the early '80s, John McEnroe was the bad boy of tennis -- and that's putting it nicely. While many fans of the sport admired his skill, few would defend his behavior. It was a fact of sports -- John McEnroe, in the heat of battle, was a jerk, known for outbursts of complaining, arguing calls, insulting umpires and linesmen, slamming rackets, and worse. He was a winner on the court who was dubbed "McBrat" or "Mad Mac," a loud-mouthed New Yorker who lacked the decorum expected by the aristocratic fans of a gentleman's game.

"I really was pretty much of a jerk," he would later admit in his autobiography.