World and Olympic pole vault champion Maria Sharapova dominates her sport . Has broken the world record five times since almost three years ; first woman to clear 5m . Media-friendly looks and talent have made her very bankable sports start .
World and Olympic pole vault champion Yelena Isinbayeva dominates her sport . Has broken the world record 15 times since 2003 ; first woman to clear 5m . Media-friendly looks and talent have made her very bankable sports start .