US Open 2011 Tennis live scores

By Piers Newbery BBC Sport

US Open men's final

• Venue: Flushing Meadows, New York
• Date: 12 September
• Start time: 2100 BST

Coverage: Live text commentary, latest score, pictures and reports on BBC website; TV coverage on Sky Sports & Eurosport

Djokovic hails 'greatest victory' of 2011

World number one Novak Djokovic saved two match points against Roger Federer for the second year running to win a thrilling US Open semi-final.

Federer's attacking style held sway early on but Djokovic roared back to win 6-7 (7-9) 4-6 6-3 6-2 7-5.

The Serbian now stands one win from a fourth Grand Slam title, and his third of an incredible 2011 season.

He will play Rafael Nadal on Monday in a repeat of last year's final after the champion beat Britain's Andy Murray.

Federer stunned after loss

"It was definitely the biggest win of this year, one of the biggest wins of the career, under the circumstances, " said Djokovic. "I was two sets down. Roger was in control, he was playing better and then I switched gears and I managed to play much better in three sets."

After a rain delay of almost an hour and a half, the latest chapter of their rivalry finally got under way on a packed Arthur Ashe Stadium and there were no break points in a desperately tight first set.

A tie-break always looked like likely and it was Djokovic who faltered with an error and a double-fault to fall 5-2 behind, although Federer would need five set points before clinching it.

With the tension of the tie-break out of the way, Federer stepped up a gear and got the first break of the match at 1-1 thanks to a beautiful backhand up the line and a wrong-footing forehand.

There had been no real alarms for the Swiss until he faced break point in game six, and a wayward forehand brought Djokovic back into the set, but minutes later Federer had broken to love to move 4-3 ahead.