KAZAN, Russia (AFP) - China's Ning Zetao was the shock winner of the men's 100m freestyle gold at the world swimming championships on Thursday.
The 22-year-old touched the wall in 47.84 seconds as Australia's Cameron McEvoy, who had been fastest in the heats and semi-finals, settled for silver at 0.11sec with Argentina's Federico Grabich earning bronze at 0.28.
Olympic champion Nathan Adrian of the United States finished seventh at 0.47 back.
Ning was banned for a year after failing a doping test in March 2011 for taking the performance-enhancing drug Clenbuterol.
He has won his first world title having picked up gold in the 50m and 100m freestyle at last year's Asian Games.
Japan's Natsumi Hoshi won the women's 200m butterfly in 2min 5.56sec, with Cammile Adams of the United States taking silver at 0.84 back while 17-year-old Chinese Zhang Yufei swam a new world junior record of 2:06.51 to take bronze.
McEvoy was delighted with his first individual medal at a world championships, having won a 4x100m freestyle relay silver in 2013.
"It's exciting, it puts me in a good position to be in for the year to come," said the 21-year-old after compatriot James Magnussen, the 2013 world champion, was ruled out of the Kazan with a shoulder injury.
"I can't be disappointed with the placing, it's the best I ever had, a world silver medal.
"Thinking back a couple of years ago it was out of reach for me so to be in this position now especially with a year to go, it's exciting."