Roger Federer continued his bid for a second US Open title with victory over David Nalbandian in the quarter-finals.
The top seed won 6-2 6-4 6-1 in the night session at Flushing Meadows and faces Lleyton Hewitt in the last four.
Federer started badly, dropping his opening service game with three unforced errors, but he hit back with three breaks to take the first set.
And he fought back from a break down again in the second before stepping up a gear to roll through the third.
Federer went into the match with a poor 2-5 record against Nalbandian but, tellingly, he had won the last two encounters.
The world number one had not been at his absolute best in the earlier rounds and again took some time to find his rhythm from the baseline.
But after breaking early, Nalbandian simply did not have the power on serve to take advantage and Federer broke at will as he wrapped up the opening set.
Nalbandian missed two break points in the opening game of the second set as Federer raised his game to hold, but the Argentine kept plugging away.
And in game five he made the breakthrough by moving to the net and punching away a forehand volley to lead 3-2.
Federer was not at his fluent best all the time but, when he did cut out the errors, he was as unstoppable as ever and a superb game eight saw him break back.
As the second set entered its final stages, the world number one sensed it was time to really take charge.
Finally hitting confidently off both sides he broke again in game 10 with a blistering backhand pass for a two-set lead, prompting Nalbandian to smash his racquet in frustration.
The Argentine's resistance was broken and Federer ran away with the third, with his ability to get to everything Nalbandian could offer clearly dispiriting the 11th seed.
"I had been struggling a little over the past few days but this was great," said Federer.
"Today it was a great rhythm I found against David, and I'm surprised it was so quick because I didn't expect this. I always expect the worst."