Tokyo Olympics: Dina Asher-Smith returns as GB qualify for 4x100m relay final
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Watch Dina Asher-Smith return to action as she helped GB qualify for the 4x100m relay final after being forced to withdraw from the individual 200m because of injury.
Watch live coverage of Tokyo 2020 on BBC One, BBC Two, the BBC Sport website, app and BBC iPlayer
COVERAGE DETAILS: Tokyo Olympics on BBC TV, radio and online