Olympic and world champion Dayron Robles will not race against local hero Liu Xiang at a May 23 meet in Shanghai, according to the name list announced by organizers.

Jamaican sprint king Usain Bolt will headline the Shanghai meet of the IAAF Diamond League circuit.

The outing will be the first on the newly-launched 14-meet Diamond League for Bolt, the world and Olympic 100m and 200m champion, and world record holder in each event (9.58 and 19.19 seconds respectively).

It will also be a first outdoor appearance for Liu, the 2004 Olympic and 2007 world champion at 110m hurdles.

The Diamond League gets under way on May 14 in Doha and culminates in Brussels on August 27.

A total of 11 reigning world champion and 11 Olympic champion will take part in the event.