Hungary’s Kristof Milak shattered Michael Phelps’s 200 metres butterfly world record Wednesday as he stormed to his first world title.

The 19-year-old, who has been flirting with the American’s 10-year-old mark this season, clocked a blistering 1:50.73 in Gwangju with Japan’s Daiya Seto pipping South African Chad le Clos for silver.