What to know

• The 40-year-old Frenchman, who is planning to retire at the end of the year, was knocked out 6-3, 6-4, 6-3 by Learner Tien, who at 20 is half Monfils' age. Monfils received a standing ovation after his final shot went into the net.S1
• Frenchman falls in straight sets to No 14 seedMonfils, 40, will retire at end of 2026 seasonTien reaches US Open third round for first timeIt would have felt more fitting if Gaël Monfils went out with a roar, with a five-set epic matching the reputation he has...S2