Surprise 2009 U.S. Open quarterfinalist Melanie Oudin (oo-DAN) says she has a muscle-damaging condition that may be caused by intense exertion. Oudin has written on her Twitter feed that her ''off season is a little paused at the moment'' because of the ailment, called rhabdomyolysis (rab-doe-my-OL-uh-sis), and she is ''doing everything possible for a speedy'' recovery. Her agent, Sam Duvall, confirms to The Associated Press on Monday that Oudin sent the tweets. At 17, she pulled off a series of upsets, including against Maria Sharapova, to reach the U.S. Open's final eight. More...