China's Sun Yang responded to Australian taunts about his doping history in emphatic fashion on Monday by winning the men's 200 metres freestyle title to complete a golden Olympic treble.
Sun, who won the 400 and 1500 freestyle at the London Games, touched the wall in one minute, 44.65 seconds to beat South Africa's Chad Le Clos by 0.55 seconds and become the first Chinese to win 200m gold.
