Who is Caster Semenya?
Caster Semenya is a two-time Olympic champion and three-time world champion over 800m.
Between 2009 and 2019, the South African dominated her sport, with victory in the Doha Diamond League 800m in May 2019 being her
30th consecutive victory, external over the distance.
She was given a hero's welcome in South Africa after picking up her first World Championship gold in 2009, with thousands of jubilant fans turning out at Johannesburg airport to greet her.
However, her rapid rise from unknown teenager to global star was also accompanied by scrutiny over her gender and possible advantages in her biology.
It was later revealed that the 32-year-old was born with differences of sexual development (DSD) which mean she has an elevated level of testosterone - a hormone that can increase muscle mass and strength.