Great Britain's men claimed a stunning 4x100m relay gold at the World Championships as Usain Bolt pulled up injured in his final ever race.
Usain Bolt pulls up hurt in final competitive race
Heartbreaking moment for Usain Bolt as he fails to finish his final ever race, the 4x100m relay, at the IAAF Championships.
On a febrile night of track and field, Mo Farah's own finale ended with 5,000m silver as he was beaten in a global final for the first time in six years.
But with the young GB women's sprint quartet storming to a silver of their own it felt like a generational shift as the stadium came alive just as it had at the 2012 Olympics.
Never before has a British team won a world sprint gold, but the quartet of CJ Ujah, Adam Gemili, Danny Talbot and Nethaneel Mitchell-Blake ran a near-perfect race to hold off the fancied US team, with Japan taking bronze as Bolt collapsed halfway down the home straight.
It was a horrible way for Bolt to end his career, his hamstring appearing to go as he attempted to chase down the two men in front of him.
A wheelchair was brought to his side before he was helped to his feet and managed to limp away, but it means he leaves his final championship with only a bronze from the individual 100m to show.
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