USA, Jamaica, Japan advanced to the final of the 4x100m relay on Friday.

In a keenly contested semi-final heat, the USA team of Christian Coleman, Fred Kerley, Brendon Barnes and JT Smith, just managed to hold off the Jamaican quartet of Ackeem Blake, Oblique Seville, Ryeim Forde and Rohan Watson to win in a what was briefly a world-leading time 37.67.

It was a blanket finish that saw the Jamaicans close behind in 37.68 and the Japanese foursome of Ryuichiro Sakai, Hiroki Yanagita, Yuki Koike and Abdul Hakim Sani Brown, who were third in 37.71.

That world-leading time by the USA lasted mere minutes as Italy’s team of Roberto Rigali, Lamont Jacobs, Lorenzo Patta and Fillippo Tortu stormed to victory in the second heat in 37.65. South Africa’s team of Shaun Maswangnayi, Benjamin Richardson, Clarence Munyai, and Akani Simbine close behind in 37.72.

Great Britain was third in 38.01.

Brazil who ran 38.19 and France 37.98 are also through to the final.