Nicola olyslagers

World Athletics Championships: The United States underlined their sprinting power by claiming three out of four relay gold medals on the last day of the World Athletics Championships here on Sunday. Botswana delivered the day's surprise in the men's 4x400m relay, clocking 2 minutes 57.76 seconds to edge the Americans by just 0.07, as South Africa settled for bronze.

"I had to run the most strategic leg because of the weather," said Botswana's Busang Collen Kebinatshipi. "I am happy to be crossing the finish line first. I am really grateful to have come home with two gold medals."

"We came here dreaming of becoming world champions. It took a lot of courage for me," teammate Letsile Tebogo added.