Russia 's Yelena Isinbayeva breaks her own women 's world pole vault record . Comment: I am very confident . Jamaican Asafa Powell wins third 100 meters race in a week in 9.82 seconds .
Russia 's Yelena Isinbayeva breaks her own women 's world pole vault record . Comment: Jamaican Asafa Powell wins third 100 meters race in a week in 9.82 seconds .