Silver medallist US athlete Jennifer Simpson (left), gold medallist Kenya's Faith Chepng'etich Kipyegon (centre) and bronze medallist South Africa's Caster Semenya pose on the podium during the victory ceremony for the women's 1,500m at the 2017 IAAF World Championships at the London Stadium in London on August 8, 2017. PHOTO | ANDREJ ISAKOVIC |