Nick Kyrgios has confessed to having accomplished nothing in his turbulent tennis career after being handed a grand slam reality check at Flushing Meadows.

"I have been around for about four years now. I have barely done anything," Kyrgios, who fell victim to a virtuoso display from Roger Federer in the third round of the US Open in New York, said.

Nick Kyrgios was reflective after his loss to Roger Federer. Credit:AP

Federer's 6-4, 6-1, 7-5 clinic left Kyrgios in a reflective mood.

After announcing his arrival on the international stage with a spectacular centre-court ambush of world No.1 Rafael Nadal at Wimbledon in 2014, Kyrgios has just two grand slam quarter-final appearances, plus four ATP titles, on his CV.