Caster Semenya's failure to qualify for the women's 5,000m final at the World Athletics Championships has raised serious doubts over her future in the sport.
In searing heat at Hayward Field in Eugene, the South African could only finish 13th in her first-round race. Her time of 15:46:12 ended up being a full 45 seconds off the mark needed to progress to the final.
Semenya, 31, is a double Olympic champion and three-time world champion over her favoured 800m distance. She's also a Commonwealth Games and African Championships gold medalist over 1500m. But since 2009, that athlete has been subjected to tough treatment at the hands of authorities.
