Van Niekerk completes 400m defence with Makwala denied entry
Wayde van Niekerk beat Steven Gardiner and Abdalelah Haroun to retain his 400m IAAF World Championships gold.
Wayde van Niekerk mounted a successful defence of his IAAF World Championships 400-metres title with potential challenger Isaac Makwala controversially denied a place on the starting blocks due to illness.