BEIJING - SEPTEMBER 18: Martina Hingis of Switzerland serves against Sun Tiantian of China during their match on day nine of the China Tennis Open on September 18, 2007 in Beijing, China. (Photo by Andrew Wong/Getty Images)
BEIJING - SEPTEMBER 18: Martina Hingis of Switzerland serves against Sun Tiantian of China during their match on day nine of the China Tennis Open on September 18, 2007 in Beijing, China. (Photo by Andrew Wong/Getty Images)