Russian pole vault champion Yelena Isinbayeva (L) stands with Chinese sprint hurdler Liu Xiang during a press conference in Shanghai on September 18, 2009. Chinese track star Liu Xiang will make his much-awaited comeback at the Shanghai Golden Grand Prix on September 20, 2009 before a hometown crowd, looking to recapture some hurdles magic after his shock withdrawal from the Beijing Games. Russian pole vault queen Isinbayeva also will compete in a bid for redemption after failing to win a medal at the August 2008 world championships in Berlin. Getty Images logo Getty Images 29 months ago

Russian pole vault champion Yelena Isinbayeva (L) stands with Chinese sprint hurdler Liu Xiang during a press conference in Shanghai on September 18, 2009. Chinese track star Liu Xiang will make his much-awaited comeback at the Shanghai Golden Grand Prix on September 20, 2009 before a hometown crowd, looking to recapture some hurdles magic after his shock withdrawal from the Beijing Games. Russian pole vault queen Isinbayeva also will compete in a bid for redemption after failing to win a medal at the August 2008 world championships in Berlin.