Highlights, Day 8

Gabby Logan introduces highlights of the penultimate day of action at the World Championships in Beijing, China. All eyes are on Great Britain's Mo Farah, the reigning Olympic 5,000m and 10,000m champion, who is looking to defend his world title in the shorter distance. There are also British medal hopes in the men's and women's 4x100m relay finals - the GB women claimed bronze at the 2013 World Championships but their male counterparts missed out on a medal after an illegal changeover. Today also sees the final of the women's 800m, in which Lynsey Sharp and Jenny Meadows will hope to challenge, plus the women's high jump.

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