Kyle Edmund continued his fine week in New York by moving into the semi-finals following an edgy win over Soonwoo Kwon.
The British number three was broken three times by the world number 84 after taking an early 2-0 lead to surrender the first set 6-3.
But Edmund rallied and broke his opponents serve twice on his way to levelling the match as he took the second set 6-2 and after the third went with serve, Edmund converted his first match point to wrap up a 3-6 6-2 7-6 (5) win.
Sixth seed Miomir Kecmanovic also had to come from behind to beat France’s Ugo Humbert 3-6 6-2 6-4.
Meanwhile, British number one Dan Evans bowed out of the ABN AMRO World Tennis Tournament in Rotterdam at the quarter-final stage after going down in straight sets to Gael Monfils.
Evans served for the first set at 5-4 but lost it to love and was then beaten in the tie-break before the Frenchman broke Evans twice to take a 4-0 lead in the second set and served out for a 7-6 (5) 6-2 win.
Canada’s Felix Auger-Aliassime advanced into the semi-finals with a 6-4 7-6 (6) win over Aljaz Bedene and Pablo Carreno Busta overcame wild card Jannik Sinner 7-5 3-6 7-6 (6) in a tight affair.
At the Argentina Open, second seed Guido Pella suffered a 6-4 7-6 (4) defeat to Juan Ignacio Londero and Casper Ruud joined him in the last four with a 7-5 6-1 victory over Dusan Lajovic.
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