Result: Shana Cox falls at semi-final stage

Result: Cox falls at semi-final stage
© PA Photos
Great Britain's Shana Cox fails to progress beyond the semi-finals of the women's 400m.

Team GB's Shana Cox has failed to qualify for the final of the women's 400m.

The American-born runner got off to a good start, which left her in contention with 200m of the race run.

However, she appeared to tighten up on the final bend and ended up finishing seventh with a time of 52.58 seconds.

Botswana's Amantle Montsho won the race, with America's Francena McCorory taking second spot.

Shana Cox
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