Jonathan Edwards introduces the morning's action from Moscow as more British and global stars look to progress to the next round of their events.
British sprint hurdler Tiffany Porter was on course for a medal at the last World Championships before clipping the penultimate hurdle and finishing fourth. She will be expected to qualify comfortably from the day's heats, along with Australia's Olympic and world champion Sally Pearson.
World junior champions Adam Gemili and Delano Williams compete for Great Britain in the 200m heats, along with team-mate James Ellington and global superstar Usain Bolt.
Commentary is provided by Steve Cram, Andrew Cotter, Paul Dickenson and Brendan Foster.