Defending champion Roger Federer gave one of his best displays of a troubled season to beat Novak Djokovic and reach his fifth consecutive US Open final.
Djokovic rallied to take the second but Federer showed his class and experience to come through.
This was a big match, I knew it from when I saw the draw," said Federer.

"He's been playing very well on hard courts for the last one-and-a-half years.
"It was important to stay grounded because I knew the match could change, like it did in the second set.
"I think I broke his will when I won the third set and then I knew if I played well I could win in four sets."

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