World No.1 Novak Djokovic  dropped a set for the first time in the US Open , but beat Russian Mikhail Youzhny  in the end safely to proceed to the semi-final, where he will face Swiss Stanislas Wawrinka.
According to the BBC, Djokovic, 26, came through 6-3 6-2 3-6 6-0 in the night session on Arthur Ashe Stadium to reach the semi-finals for the seventh year running.
The report said that Youzhny, 31, has previously reached two semi-finals at Flushing Meadows, beating a 20-year-old Nadal along the way in 2006, and would not give up his chance of a third without a fight.
Djokovic had made an uncharacteristic 16 unforced errors in the third set and was not in the mood to give his opponent any more help, the report added.
Stepping up the intensity markedly he left Youzhny helpless in the face of 10 winners, reeling off the last six games and securing victory with a forehand deep into the corner, the report further said. (ANI )