成人快手

John Inverdale introduces live coverage from Berlin as the 12th World Championships reach the penultimate day of action inside the Olympic stadium.

There are six titles on offer, including the evening's curtain raiser of the men's and women's 4x100m relay finals. Usain Bolt was part of the Jamaican quartet who broke the world record at the Olympics in 2008. Can they better that mark on the distinctive blue track in Berlin?

Elsewhere, Panama's reigning world and Olympic long jump champion Irving Saladino has stated publicly he aims to become the first man to leap nine metres in Germany. The women's 5,000m and hammer and men's pole vault medals also conclude.