Warholm retains wins men's 400 metres hurdles world title
Karsten Warholm retained his 400 metres hurdles world title in impressive fashion on Monday.
The 23-year-old Norwegian -- who is on an unbeaten streak of 14 races -- came home clear of main rival Rai Benjamin timing 47.42 seconds with the American finishing in 47.66.
Qatar's Abderrahman Samba took bronze in 48.03.
