Third seed Novak Djokovic beat second seed Roger Federer in five-set thriller to advance into his second US Open final on Saturday.

Djokovic outmatched Federer 5-7, 6-1, 5-7, 6-2, 7-5 to snatch the five-set epic victory in three hours 43 minutes.

"I am very proud of myself. There are a lot of emotions involved. Of course, I was too exhausted to show them in the end, but it's a fantastic semifinal," said the 2007 US Open runner-up.

"I think I can compare the feeling with winning a major after I have won this kind of match. Still one match to come. I have to try to stay stable and calm as much as I can."

Federer made 65 unforced errors, 27 more than his Serbian opponent.

"I lost a couple more with match points this year, so they all pretty much feel the same.

They feel somewhat empty at the end because you have tried everything and maybe it was luck," said the 16 Grand Slam titlist.

"Maybe it was he (Djokovic) played well. Maybe you didn't pick the right shot."

Djokovic is through to his second New York final, and he will face world number one Rafael Nadal on Sunday.

The Spaniard beat Russia's Mikhail Youzhny 6-2, 6-3, 6-4 in the first semifinal on "Super Saturday".

Djokovic, 2007 runner-up, has been knocked out of the U.S. Open three straight years by Federer -- in the 2007 final and in the semifinals the past two years.

In the first set, the two seeds exchanged breaks to force a 5-5 draw before Federer notched three straight points, earning a triple break point in the 11th game to wrap up the set 7-5.

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