Britons Jacob Fearnley, Toby Samuel, Harry Wendelken and Harriet Dart stand one win away from a place in the US Open main draw after coming through their second round qualifying matches in New York.
Fearnley showed great resilience in battling to a three-set victory over Frenchman Luka Pavlovic, which set up a meeting with Austria’s Jurij Rodionov.
The 25-year-old world number 100 recovered from a break of serve down to take the opening set, and held his nerve in the decider after his opponent levelled the match to clinch a 6-4 6-7 (4-7) 6-4 win.
Samuel, bidding to qualify for the US Open for the first time, produced a comeback victory against fellow Briton Billy Harris.
The 23-year-old, who made his slam debut at this year’s French Open, recovered to win 4-6 6-4 6-1 and set up a meeting with Chile’s former top-20 player Cristian Garin.
Wendelken, who has never contested the main draw at an overseas slam, saved a match point to come through a three-hour tussle with Switzerland’s Remy Bertola.
The 24-year-old, ranked 196th, appeared on the brink of elimination at a set and 5-2 down, but denied Bertola a match point to level at 5-5 before edging the second-set tie-break.
Wendelken took charge of the decider, establishing a 5-2 lead, but was forced to withstand a late fightback from his opponent before eventually clinching a 5-7 7-6 (7-4) 6-4 win. He will face Lithuania’s Vilius Gaubas next.