London — The 400m world record holder, Wayde van Niekerk, says he wants to become the first athlete to break the 43sec barrier for the one-lap event.

The 28-year-old South African — who timed 43.03sec in the 2016 Rio Olympics final to set the new mark — said in a BBC interview with former world record holder Michael Johnson that he is determined to make up for lost time after a couple of years of recovering from a serious knee injury...

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