Organisers have confirmed that the three fastest men in the world this year will compete at the upcoming Diamond League meeting in Lausanne.

Asafa Powell, as well as American duo Justin Gatlin and Tyson Gay, have all stated their intention to race over 100m at the meeting, which takes place on July 9.

Last month, Gatlin clocked a time of 9.74s in Doha, while Powell and Gay have posted season-best times of 9.84s and 9.88s respectively.

Usain Bolt, who holds the world record over 100m, will also be present at the Athletissima, but he has confirmed that he will only compete in the 200m.

Twelve months ago in Lausanne, 2004 Olympic gold medalist Gatlin finished ahead of second-placed Gay in a time of 9.80s.