Sydney McLaughlin obliterated her own world record to claim a thrilling last-gasp victory over rival Dalilah Muhammad in the Olympic women’s 400m hurdles final on Wednesday. 

In another classic duel between the two dominant American hurdlers, McLaughlin surged past Muhammad just metres from the line to win in 51.46sec, slicing a whopping 0.44sec off her previous mark of 51.90sec.