Shaunae Miller stunned Allyson Felix to win the 400m final and deny the American a fifth Olympic gold thanks to an audacious dive across the finish line.

The 22-year-old Bahamian went out hard from lane seven and led coming into the home straight, but Felix looked set to reel her in.

As the world champion tied up, though, Miller launched herself over the line to take victory in a new personal best of 49.44s.

Shaunae Miller falls over the finish line to claim victory in the women’s 400-metre final