Reaction and analysis from the opening session of the World Athletics Championships in London, where Mo Farah was defending his world 10,000m title.
World record holder Usain Bolt began his bid for a 12th gold medal in his final appearance at a major championship.
Elsewhere on the track double-European indoor champion, Laura Muir was also in action in the heats of 1500m.
Expert analysis is provided by eight-time world champion Michael Johnson.
World Athletics Championships 2017, Friday, 10 pm – BBC Two