Roger Federer looks in no mood to surrender his US Open title after recording his 38th consecutive win at the tournament.

The five-time defending champion dominated his fourth-round encounter with Tommy Robredo, cruising to a 7-5 6-2 6-2 victory on the Arthur Ashe Stadium on Monday.

The world number one, who will now face Robin Soderling in a repeat of this year's French Open final, held his serve throughout the contest as Robredo was totally outclassed.

The only time the Spaniard looked capable of troubling Federer was in the first set.

He actually held two break points in the fourth game but struggled on his returns.

It took the champion until the 11th game for him to secure the decisive break of serve - a poor backhand from Robredo proving crucial.

Federer found his rhythm better in the second, with back-to-back breaks of the Robredo serve taking him 5-1 ahead.

He duly served out and refused to take his foot off the pedal in the third.

He was soon 4-0 up and although Robredo salvaged some pride with a couple of service holds, Federer went on to clinch victory with an ace.

Swede Soderling will doubtless face a tough task in the quarter-finals - he has yet to beat Federer in their 11 meetings.