Video: Andy Roddick fires serves at his agent's derriere

Lacoste has partnered with Yahoo! Sports to provide exclusive content on the 2010 U.S. Open.

The main difference between the tennis target practice of Roger Federer and Andy Roddick? Federer's could have been dangerous. Roddick's was supposed to be.

Recently, Roddick showed cameras the final step in the classic tennis practice game "butts up," where the losers go to the other side of the court, turn around, stick out their posteriors and await a hard shot from the victor. In this case, Roddick played the role of the winner and his agent and reps from Lacoste and Babolat played the losers.

Because there were no special effects, it took Roddick a few shots to make direct contact. When he did: ouch.

All things considered, I think I'd rather stand with a bottle on my head.

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