World number 41 Benoit Paire has revealed his delight after defeating the fourth-seeded Kei Nishikori at the US Open this evening.
The Frenchman battled back from being two match points down on his way to claiming a shock 4-6 6-3 6-4 6-7 4-6 win over Nishikori, who has been suffering from injury problems in the build-up to the tournament.
"It was impossible for me to imagine this," Paire told spectators at Flushing Meadows after his win.
"I am going to go out and have a good time with my coach and friends now."
Paire will now face Marsel llhan in the second round.
