Van Niekerk set to become sprinting's next global superstar

Win or lose, Usain Bolt was always going to dominate the Olympic headlines on Sunday.

But South Africa's Wayde van Niekerk offered his embattled sport some hope for after the Jamaican's retirement with a stunning world record on the Rio track.

Twenty minutes before Bolt won his third straight 100m title, van Niekerk ran at an unrelenting pace to clinch the gold medal and break Michael Johnson's 17-year-old record of 43.03 sec in the 400m.