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Russia's Yulia Efimova reacts after competing in the Women's 100m Breaststroke Semifinal during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 7, 2016. / AFP / GABRIEL BOUYS (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)

Russia's Yulia Efimova reacts after competing in the Women's 100m Breaststroke Semifinal during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 7, 2016.   / AFP / GABRIEL BOUYS        (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)