Liu Xiang's hurdles rematch with Jason Richardson is the most anticipated race of the Shanghai Diamond League meet on Saturday.
Dayron Robles won the 110-meter hurdles at the world championships in Daegu, South Korea, last August, but was disqualified after Liu appealed. Robles smacked Liu's hands over the last hurdles. Richardson was promoted to the gold medal, and Liu received the silver.
Liu, the 2004 Olympic gold medalist and last year's champion in Shanghai, is coming off a victory in his first outdoor race of the season in Japan two weeks ago.
The hurdles field also includes Americans David Oliver, the 2008 Olympic bronze medalist; Terrence Trammell, a two-time Olympic silver medalist; and Aries Merritt, who defeated Liu in March to win the world indoor 60-meter hurdles.
Robles, the 2008 Olympic champion, wasn't entered.
Liu joked that the incident in Daegu made his friendly relationship with Robles ''even better.'' He added that a healthy rivalry was important to the spo...