Enjoy two thrilling days of world-class athletics and a real party atmosphere at the Aviva London Grand Prix in Crystal Palace. The officials have got their starter's guns at the ready as the fastest man in the world this year, Jamaica's Asafa Powell, takes on former triple world champion USA 's Tyson Gay in the 100m.

Part of the new and prestigious Samsung Diamond League, a series of the top 14 grand prix meets from around the globe, expect to see fierce competition as the sports big names clash on the track and field.

The best of British will also be on show at Crystal Palace when the Aviva Great Britain and Northern Ireland team members return from European Championship success just 2 weeks earlier, captained by gold medal hopeful, Jessica Ennis. Ennis will be joined on the 26 July to 1 August in Barcelona by as many as 10 medallists from the 2009 World Championships in Berlin and five from the World Indoor Championships held in Doha earlier this year, and a number of other medal contenders.

We're getting ready for another weekend of world class athletics and family fun, so come and join the party!