US Open: Roger Federer dumped out by unknown John Millman

                                       

Unheralded Australian John Millman pulled off one of the all-time great tennis shocks by defeating Roger Federer to reach the US Open quarter-finals.

Millman had been given barely a sniff before the match, with excitement already building for a last-eight clash between Federer and Djokovic.

The 29-year-old, who had never previously beaten a top-10 opponent, appeared to have even less chance of winning with Federer a set and a break up and holding two set points, but he somehow clawed his way back to clinch a 3-6 7-5 7-6 (8/6) 7-6 (7/3) victory.

While Millman produced the performance of his life, Federer gave one of his poorest performances on the big stage, struggling with all parts of his game and making 76 unforced errors.

It was the 37-year-old's earliest loss at a slam since the Australian Open in 2015 and the first time he has ever lost to a player ranked outside the top 50 in New York.