Unseeded and unranked Kim Clijsters upset the defending US Open Champion, Serena Williams, during their semifinal match on Saturday, 6-4, 7-5.

While losing the match, Williams went crazy and almost attacked a line judge for calling a fault.

“I swear to God I’m [expletive] going to take this [expletive] ball and shove it down your [expletive] throat, you hear that? I swear to God, Williams was heard telling the official.”

When Serena continued to rant, Clijsters was rewarded a penalty point.

“She was called for a foot fault, and a point later, she said something to a line umpire, and it was reported to the chair, and that resulted in a point penalty,” referee Brian Earley explained. “And it just happened that point penalty was match point. It was a code violation for unsportsmanlike conduct.”

Serena’s reputation has taken a big hit because of her actions during this match. She’s an experienced player and she should know by now how to keep her temper under control. It’s too bad this whole “temper tantrum” takes away from the great play of Kim Clijsters.