Russian champion to compete in London Grand Prix

Olympic pole vault champion Yelena Isinbayeva will warm up for her defense of the world championship title at next month\'s London Grand Prix.



The 27 year old Russian, who is favorite to retain her title at August\'s World Championships in Germany, has won six previous meetings and set three world records in London.



Beijing Olympic triple gold medallist Usain Bolt of Jamaica is already confirmed for the July 24 to 25 meet at Crystal Palace in south London.