Roger Federer suffered a shock loss to Tommy Robredo at the US Open on Monday, ruining the prospect of meeting Rafa Nadal at the only grand slam where the two greats have never played each other.

In the biggest upset of the tournament, Robredo demolished a badly out-of-sorts Federer 7-6 6-3 6-4 in the fourth round, marking the first time in a decade the Swiss master has fallen before the quarter-finals at Flushing Meadows.

“I kind of feel like I beat myself, without taking any credit away from Tommy,” a dejected Federer told reporters.

“I kind of self-destructed, which is very disappointing, especially on a quicker court. I just couldn’t do it. It was a frustrating performance.”

As expected, Nadal safely made it through, recovering after losing a set for the first time in the tournament to beat Philipp Kohlschreiber 6-7 6-4 6-3 6-1 at the Arthur Ashe Stadium.

But his win was overshadowed by Federer’s unforeseen loss against a player he had beaten in each of their 10 previous meetings, spoiling what was looming as the first meeting between the pair in the Big Apple.

There was an omen even before the match began when officials moved it from the center court to the smaller Louis Armstrong Stadium following a five-hour rain delay.

US Open champion for five straight years from 2004, the last time Federer played a match away from Arthur Ashe Stadium was in 2006 but refused to blame the court switch for a performance that will raise fresh speculation whether he is capable of adding to his record 17 grand slams.

“That should not be the issue. That’s definitely the last excuse you could find,” Federer said.

Robredo will now face Nadal in the quarters, ensuring there will be at least one Spaniard in the semi-finals. There well could be another after David Ferrer joined his countrymen by beating Serbia’s Janko Tipsarevic 7-6 3-6 7-5 7-6.

The fourth seed will play Richard Gasquet after the Frenchman saved a match point in the fourth set tiebreak before going on to outlast Canada’s Milos Raonic 6-7 7-6 2-6 7-6 7-5 in a slugfest that lasted four hours and 40 minutes.

Raonic served 39 aces and hit 102 winners but paid the price for 80 unforced errors.

Earlier, Daniela Hantuchova advanced to the QFs for the first time in more than a decade.

The 30-year-old had not reached the last eight in New York since she was a teenager in 2002 but made up for lost time with a 6-3 5-7 6-2 victory over wildcard Alison Riske.

Yesterday’s result: Azarenka bt Ivanovic 4-6 6-3 6-4.

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