08 JUL 2011 - PARIS, FRA - Caster Semenya (centre) powers from the start of the women's 800m race at the Meeting Areva round of the Samsung Diamond League (PHOTO (C) NIGEL FARROW)

08 JUL 2011 - PARIS, FRA - Caster Semenya (second from right) celebrates winning the women's 800m race at the Meeting Areva round of the Samsung Diamond League .(PHOTO (C) NIGEL FARROW)

08 JUL 2011 - PARIS, FRA - Usain Bolt wins the men's 200m race at the Meeting Areva round of the Samsung Diamond League ahead of Mario Forsythe (left) and Christophe Lemaitre (right) .(PHOTO (C) NIGEL FARROW)

08 JUL 2011 - PARIS, FRA - Usain Bolt poses for photographers after winning the men's 200m race at the Meeting Areva round of the Samsung Diamond League (PHOTO (C) NIGEL FARROW)

08 JUL 2011 - PARIS, FRA - Dayron Robles (right) beats David Oliver (left) in the men's 110m hurdles at the Meeting Areva round of the Samsung Diamond League (PHOTO (C) NIGEL FARROW)

08 JUL 2011 - PARIS, FRA - Amine Laalou celebrates winning the men's 1500m at the Meeting Areva round of the Samsung Diamond League (PHOTO (C) NIGEL FARROW)

08 JUL 2011 - PARIS, FRA - Goldie Sayers prepares for her next throw in the women's javelin at the Meeting Areva round of the Samsung Diamond League (PHOTO (C) NIGEL FARROW)