South African Caster Semenya has powered past other competitors in the Women's 800-metre final today to win gold.

David Gray / Reuters

Semenya blitzed the field in the final 300 metres, finishing with a time of 1:55.28, a personal best and a South African record.

The South African was the favourite to win the race, being a force within women's running since the 2009 world track and field championships. Semenya won silver in the same event at the London Olympics in 2012.

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