16th IAAF World Athletics Championships London 2017 - Day Ten [Getty Images]

LONDON, ENGLAND - AUGUST 13: Caster Semenya of South Africa win's the Women's 800m final during day ten of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 13, 2017 in London, United Kingdom. (Photo by Ian MacNicol/Getty Images)

Getty Images Sport Ian MacNicol