Hurdler Jasmine Camacho-Quinn claimed Puerto Rico’s first Olympics athletics gold on Monday but Belarusian sprinter Kristina Timanovskaya was absent from the women’s 200m after claiming her country had forced her to leave the Games.

Also on day four of track and field in steamy Tokyo, Greece’s Miltiadis Tentoglou left it late to win the men’s long jump while Dutch distance runner Sifan Hassan kept up her bid for an unprecedented treble on track despite falling.

Elsewhere on day 10 of the competition, the track cyclists start their campaign with Britain’s dominance under threat and transgender athlete Laurel Hubbard is preparing to make history in the women’s weightlifting competition.

The Olympic Stadium witnessed a dramatic evening on Sunday as unheralded Italian sprinter Lamont Marcell Jacobs stormed to a shock gold in the men’s 100 metres in a time of 9.80 seconds.

Attention switched on Monday to the finals of the women’s 100m hurdles and the men’s long jump as well as qualifying for the women’s 200m and 1500m.

Camacho-Quinn, 24, who had set an Olympic record 12.26sec in the semi-finals of the 100m hurdles, surged home to claim her first major title in 12.37sec.

World record-holder Keni Harrison of the United States took silver in 12.52sec while Jamaica’s Megan Tapper claimed bronze.

“For such a small country it gives little people hope,” said Camacho-Quinn. “I am just glad I am the person to do that.”

In the men’s long jump, European champion Tentoglou leapt a best of 8.41 metres on his sixth and final attempt to snatch victory from Cuban Juan Miguel Echevarria, who also jumped 8.41m but had an inferior second-best jump.