Highlights, Day 9

Gabby Logan introduces highlights of the final day of action at the World Championships in Beijing, China. The championships conclude with the final of the men's and women's 4x400m relays, in which the USA and Russia are the respective defending champions. However, Team GB could be medal prospects in both races - the British women earned bronze at the 2013 worlds, while the men were edged out into fourth place. In the women's 5,000m all eyes will be on Ethiopian Genzebe Dibaba, who has been in scintillating form of late, breaking the 1500m world record last month. There's also action from the men's 1500m and high jump.

Providing expert analysis and opinion alongside Gabby is four-time Olympic gold medallist Michael Johnson.