Caster Semenya is making a bold bid for double gold in the women's 800m and 1500m but her only guarantee at the World Athletics Championship in London is further scrutiny of the gender controversy that has dogged her career.
The powerful, 26-year-old South African is runaway favourite for the 800m, where she seeks a third world title to add to Olympic gold from Rio de Janeiro last year, and is taking on the 1500m for the first time at a major international meeting.
All of this, though, will come under a cloud of controversy at the August 4-13 championships as many feel high testosterone levels give her an unfair advantage.
Caster Semenya is going for 800m and 1500m gold in London at the World Championship
Semenya, 26, has had her gender questioned in the past and outlined her frustrations over it
Anticipating a storm, Semenya this month granted a rare interview to South Africa's SuperSport TV channel, expressing her frustration at continually having her gender questioned.
'I don't understand when you say I have an advantage because I am a woman,' she said. 'When I pee, I pee like a woman. I don't understand when you say I'm a man or I have a deep voice. I know I am a female so there's no question for me.
'I have to find