BBC Sport - World Athletics Championships 2017: Usain Bolt through with 'very bad' run

Bolt through with 'very bad' run

Usain Bolt wins his 100m heat to reach the semi-finals of the World Athletics Championships but describes his run as "very bad."

WATCH MORE: Muir cruises into 1500m semi-finals

READ: Bolt frustrated despite winning heat

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World Athletics Championships 2017