Semenya, who has been subject to gender testing and was diagnosed with hyperandrogenism, won silver at London 2012.
Result: South Africa's Caster Semenya powers to Olympic women's 800m gold
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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.
Caster Semenya to focus just on 800m>
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