Defending champion Novak Djokovic tackles Spanish bulldozer David Ferrer for a US Open final spot today determined to preserve the Grand Slam stranglehold of  himself, Roger Federer and Rafael Nadal.

The world’s top three have confidently parcelled out 29 of the last 30 majors between them but, for the first time in more than eight years, a Grand Slam has reached the last-four stage without either Federer or Nadal still involved.

Federer, the 17-time Grand Slam title winner, was knocked out in the quarter-finals while Nadal, the holder of 11 majors, never even made it to New York, forced to rest his increasingly troublesome knees at home in Spain.

That leaves 25-year-old Djokovic, battling to win a sixth major, as the sole survivor of the golden generation at Flushing Meadows.

The Serb has certainly looked the part, reaching a sixth successive US Open semi-final – and 10th in a row at all Grand Slams – without dropping a set.

On Thursday, he demolished 2009 champion Juan Martin Del Potro 6-2, 7-6, 6-4 in the quarter-final to set up a date against Ferrer, whom he has beaten eight times in 13 meetings with a 7-2 hardcourt advantage.

If he gets through, either Andy Murray, four-times a runner-up at the majors, or Tomas Berdych, Federer’s conqueror and a major finalist just once, will be waiting in tomorrow’s championship match.

“Murray, Berdych, Ferrer, myself, we’re all top 10 players. Maybe for some people it was surprising to see Roger lose because he’s been so consistent and dominant a player in the last couple of years,” said Djokovic.

“He’s always expected to get to at least semi-finals of every Grand Slam. But Berdych deserved to win. He came up with incredible tennis. I have never seen him play that well.”

Djokovic said he would not be under-estimating Ferrer who has equalled his best Grand Slam performance of a run to the semi-finals in New York in 2007.

“David is a fighter. He’s one of the biggest competitors we have in the game. People overlook him,” said the world number two.

Meanwhile, Murray admits he has nothing but respect for Czech power-hitter Berdych.

Berdych’s stunning victory over Federer condemned the great Swiss to his worst defeat in New York since 2003.

The sixth seed will be making his semi-final debut this evening against the British third seed, who was runner-up to Federer in 2008, and will be buoyed by a winning record against the Scot that stands at 4-2.

“Berdych is a great player. Let’s show him some respect, too,” said Murray after his passage to the last four for the third time was followed almost exclusively about the potential dangers posed by Federer.

That was after Murray had seen off a choking Marin Cilic on Wednesday afternoon but before Berdych ended Federer’s proud record of 21 successive wins in night sessions at the Arthur Ashe Stadium.

Berdych has only made one Grand Slam final in his career – at Wimbledon in 2010 where he lost to Nadal after beating Federer in the quarter-finals.

He has also won four of his last five matches against Murray who is bidding to become Britain’s first major winner since Fred Perry in 1936.

Women’S Singles Sf

Azarenka bt Sharapova 3-6, 6-2, 6-4.

Men’S Doubles Final

B. Bryan/M. Bryan bt L. Paes/R. Stepanek 6-3, 6-4.

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