Kyle Edmund powered past 13th seed Richard Gasquet to claim the best win of his career and reach the second round of the US Open.
Edmund, ranked 84th, beat the former semi-finalist 6-2 6-2 6-3 on a hot afternoon at Flushing Meadows.
The Briton, 21, will face American wild card Ernesto Escobedo in round two.
British number one Johanna Konta plays American Bethanie Mattek-Sands later on Monday, with Andy Murray among six Britons in singles action on Tuesday.
I played better than I expected - Edmund
Edmund bullied former semi-finalist Gasquet with his huge forehand on his way to a two-set lead, as the Frenchman struggled in 32C heat on court five.