Result: South Africa's Caster Semenya powers to Olympic women's 800m gold

South Africa's Caster Semenya silver medalist celebrates after the women's 800m final at the athletics event of the London 2012 Olympic Games on August 11, 2012
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South Africa's Caster Semenya wins Olympic gold in the women's 800m at Rio, but Great Britain's Lynsey Sharp misses out on a medal after finishing sixth.

South Africa's Caster Semenya has won Olympic gold in the women's 800m at Rio, with Great Britain's Lynsey Sharp finishing sixth and missing out on a medal.

Semenya, 25, set a national record to win in one minute 55.28 seconds and finish well clear of silver medallist Francine Niyonsaba of Burundi.

Kenya's Margaret Nyairera Wambui, meanwhile, took the bronze medal, while Team GB's Sharp set a new personal best of 1:57:69.

Semenya, who has been subject to gender testing and was diagnosed with hyperandrogenism, won silver at London 2012.

South Africa's Caster Semenya silver medalist celebrates after the women's 800m final at the athletics event of the London 2012 Olympic Games on August 11, 2012
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