BEIJING - OCTOBER 10:  Novac Djokovic of Serbia returns a shot to Robin Soderling of Sweden in their semi-finals during day nine of the 2009 China Open at the National Tennis Centre on October 10, 2009 in Beijing, China. Getty Images logo Getty Images 28 months ago

BEIJING - OCTOBER 10: Novac Djokovic of Serbia returns a shot to Robin Soderling of Sweden in their semi-finals during day nine of the 2009 China Open at the National Tennis Centre on October 10, 2009 in Beijing, China.