Day 4 - Part 1

Jeanette Kwakye presents live coverage from Doha where it is all eyes on Britain's triple European champion Dina Asher-Smith. Asher-Smith is in action in the 200m heats as she attempts to recreate her heroics from last summer's European Championships in Berlin.

Olympic gold medallist Shaunae Miller-Uibo is also in action in the 400m heats as the Bahamian begins a campaign she hopes will end with a maiden world title.