Sprint hurdler Nia Ali led a final day gold rush for the United States as the curtain came down on the World Championships.
Ali powered to victory in the 100 metres hurdles to upset world record holder Keni Harrison with a time of 12.34sec at the Khalifa Stadium on Sunday.
"I've been training really hard, especially coming back from having my kids," said 30-year-old mother-of-two Ali, who was accompanied by both of her children on her lap of honour.
"These ladies have been raising the bar all year so I knew what I had to do."
- More gold for Felix - =======================