LOS ANGELES — Laura Wilkinson and her diving partner Jessica Livingston have lost their appeal to compete in 10-meter synchronized platform diving at the Beijing Olympics.

An arbitrator ruled in a decision announced today to keep 15-year-olds Haley Ishimatsu and Mary Beth Dunnichay as the synchro platform team for next month's games.

Wilkinson and Livingston had filed a complaint against USA Diving and the U.S. Olympic Committee asking to be placed on the team or have another competition to see if they or Ishimatsu and Dunnichay should compete in Beijing.