Chad Le Clos has successfully defended the 100m butterfly title that he won in Barcelona in 2013 with victory at the World Swimming Championships in Kazan.
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The South African broke the African record as he posted a time of 50.56s, finishing 0.31s ahead of Hungary's Laszlo Cseh, who took the silver.
Joseph Schooling of Singapore completed the top three, setting a new Asian record with a time of 50.96s, a day after breaking his national record in the semi-finals.
Le Clos also won a silver in the 200m butterfly earlier this week.
