PHILADELPHIA - Nearly all of the world's top sprinters, including Tyson Gay, Asafa Powell, Allyson Felix, Jeremy Wariner, Sanya Richards and Lauryn Williams, are slated to compete Saturday at USA vs. The World at the Penn Relays.

After dominating performances over the last three years saw the home team win five of the six races contested, Team USA will attempt to equal or better that performance Saturday during the first event of the 2008 USATF Outdoor Visa Championship Series. USA vs. The World at the Penn Relays will be broadcast live on ESPN2 from 2-4 p.m. Eastern Time.

Potent lineups

Nearly 150 athletes from 11 countries around the world will compete at this year's USA vs. The World, held annually at the Penn Relays since 2000 and featuring men's and women's 4x100 and 4x400m relays, a men's Distance Medley Relay and a women's Sprint Medley Relay. Countries challenging Team USA this year include Jamaica, Kenya, Russia, Great Britain, Canada, Bahamas, Dutch Antilles, Saudi Arabia, Zimbabwe, Trinidad & Tobago and the Dominican Republic.

An impressive array of U.S. men's stars led by the world's #1 ranked male sprinter, 2007 World Outdoor triple gold medalist Tyson Gay, 2004 Olympic gold medalist and two-time World Outdoor 400m champion Jeremy Wariner, two-time World Outdoor 200m medalist Wallace Spearmon, 2007 World Outdoor 400m hurdle champion Kerron Clement, 2007 World Outdoor 400m silver medalist LaShawn Merritt and 2004 Olympic and two-time World Outdoor 4x400m gold medalist Darold Williamson will look to keep Team USA on the winning track. Also watch for 2006 quadruple NCAA champion Xavier Carter, 2007 U.S. Indoor 800m champion Nick Symmonds and 2008 U.S. Indoor 60m champion Michael Rodgers.