She makes John McEnroe look like an alter boy..

For nearly two weeks, Serena Williams had made a flawless run through the U.S. Open, pulverizing opponents and dominating matches But It all unraveled in unimaginable fashion Saturday night, with a foot fault, a profane tirade and a code violation after an irate Williams told a lineswoman, "I swear to God, I'll f --- take this ball and shove it down your f -- - throat. ".