London - South African Caster Semenya, dogged by gender accusations since shooting to fame in 2009, won a third world title in the women's 800m on Sunday.
Semenya, the defending Olympic champion and also world champion in 2009 and 2011, timed 1:55.16, the fastest time of the year so far.
Burundi's Francine Niyonsaba, the Olympic silver medallist and world indoor champion, finished second in 1:55.92, with American Ajee Wilson taking bronze (1:56.65).