#9. Caster Semenya
Mokgadi Caster Semenya is a South African middle-distance runner and 2016 Olympic gold medalist. Semenya won gold in the women’s 800 metres at the 2009 World Championships with a time of 1:55.45 and at the 2017 World Championships in her new personal best, 1:55.16.
Semenya also won silver medals at the 2011 World Championships and the 2012 Summer Olympics, both in the 800 metres. She was the winner of the gold medal in the 800 metre event at the 2016 Summer Olympics. She keeps on getting better and better.