“You cannot be serious!” instantly became the line that defined McEnroe’s life. He even used the quote as the title of his biography after he retired. The catchphrase materialized during Wimbledon in 1981. The British tournament is notorious for its strict rules and code of conduct, while McEnroe was a fiery personality. In short, they weren’t a match made in heaven.
He played Tom Gullickson in a game where the umpire ruled that his serve was out. The US tennis star instantly erupted with one of tennis’s most famous tantrums and began with that immortal line. He continued lambasting the official for several moments and outraged the Wimbledon organizers in the process. They even broke with tradition by refusing to make him a member of the All-England Club.
The second of Williams’ tantrums on this list, this one is even worse than the previous. It occurred at the U.S Open in 2009 and was notoriously bad. After umpire Shino Tsuruchi called her for a foot fault on her second serve, Williams reacted with poisonous vitriol. “I’m going to shove this f***ing ball down your f***ing throat,” she said. Needless to say, that’s not acceptable behavior.
Two years later in the final of the U.S Open, she had another meltdown. This time she targeted Eva Asderaki after a code violation. “Really, don’t even look at me,” she said. “If you ever see me walking down the hall, walk the other way. Because you’re out of control. Totally out of control. You’re a hater, you’re unattractive inside. Who would do such a thing?” Now Williams has a reputation.