Allyson Felix will run for real gold
in Zurich [GALLO/GETTY]
Allyson Felix and Sanya Richards will run for actual gold in Switzerland after the Olympics.

Organisers of Zurich's Weltklasse track and field meet announced that Felix and Richards will race over 200 and 400 meters at the August 29 event.

There is a bonus prize of 500 grams of gold if either American wins both races.

Felix is a double world champion over 200, and was with Richards on the 1,600-meter relay team that won gold at the world championships in Osaka, Japan, last year.

Richards also won 1,600 relay gold at the 2004 Athens Olympics.

The Weltklasse is known as the "One-Day Olympics" with 24 world records set during its 80 years.

The men's 400 at Zurich also promises to be a highlight for United States athletes.

Olympic and world champion Jeremy Wariner and world silver medallist LaShawn Merritt have both committed to run.