Caster Semenya, 25, a South African runner, is tipped to win the 800m But the athlete has ignited a debate about gender at the Olympic Games Semenya has testosterone levels three times the normal level in women She has no womb or ovaries but rather internal testes due to abnormality Of all the stars at Rio, few are as hotly tipped for resounding victory as 800m runner Caster Semenya. Fewer still can match her for controversy. There are those who say she should not be allowed to compete in the Olympics women’s 800m, which she is almost certain to win....