Round 1 took place on 1 August, with the 50 athletes involved being split into 7 heats, 6 heats of 7 and 1 of 8 athletes.[5] The first 3 athletes in each heat ( Q ) and the next 3 fastest ( q ) qualified to the semi-final.[6] The overall results were as follows:[7]
The semi-final took place on 2 August, with the 24 athletes involved being split into 3 heats of 8 athletes each.[8] The first 2 athletes in each heat ( Q ) and the next 2 fastest ( q ) qualified to the final.[9] The overall results were as follows:[10]