Bad behavior

What got into Serena Williams tonight? Playing Kim Clijsters in the semis at the U.S. Open, Serena couldn't get her game together. Clijsters beat Serena (6-4, 7-5) using a combination of aggression, speed, and solid shot-making, but the World #2 also beat herself. She wasn't getting many first serves in and she was winning a dismal 33 percent on her second serves (which lacked their usual kick).

When Williams smashed a racquet in frustration when she double-faulted to hand Clijsters the first set, I thought maybe a little anger would help her get her head in the game and get her game together. Nope. I've seen Serena play flat, and though I wouldn't accuse her of that tonight, I have to level a worse charge.

As Serena served down one set at 5-6, 15-30, a linesperson called a foot fault on Williams' second serve, putting the score at 15-40. Serena, who didn't appear to foot-fault according to the replay, went off on this woman, who appeared half her size. According to the LA Times, which cites the accounts of courtside spectators, Serena said: "You don't know me. You better be right. I could shove this ball down your throat." Really awful. Unsportsmanlike.

Her hideous outburst and the earlier racquet abuse combined for a point penalty. With that, she lost the match and her dream of capturing her third Slam of the year. A shame, really, and horrible to behold in someone I admire and support. She showed no contrition in the press conference afterwards. I'm left with a sour feeling.

Gotta give kudos to Klijsters, who I imagine will beat Wozniacki in the final tomorrow, for playing a great, focused match and looking like a real champion.