The brutal toll of five rounds of tennis on New York's hard courts was apparent as all four players struggled through injury or illness that delayed both matches at times.
The British No 1 will play World No 1 Jannik Sinner in his first grand slam semi-final after he secured a 6-3, 7-5, 6-2 victory over Alex de Minaur
Jack Draper shed light on his private morning ritual at the US Open after booking his spot in the semi-final.
He beat Australian de Minaur 6-3 7-5 6-2 in a dominant performance and is now into the last four.