Rio Olympics 2016: Wayde van Niekerk wins 400m gold and smashes Michael Johnson record

There was an error

Sorry, this content isn't available any more.

Wayde van Niekerk of South Africa runs 43.03 seconds in the men's 400m final to eclipse Michael Johnson's 17-year-old world record and win gold at Rio 2016.

Watch full coverage of the event here.

Available to UK users only.