Swiss master Roger Federer may seem a superhuman sports star to his fans around the world.

But, after trouncing Australia's Lleyton Hewitt in three straight sets in one the most dominating performances in US Open finals history, he looked and felt particularly uninspired.

''I'm exhausted,'' said the 23-year-old, after winning his first four grand slam finals. ''There is a chance I might even get sick because I already felt it the last two days.

''The next two weeks are important to recover and get ready for the rest of the season so I don't get injured.''

Federer continues to set records with every fresh victory. He has won four grand slams, 20 career singles titles and more than 15m US dollars in prize money.

''Every grand slam had something different,'' he said. ''Wimbledon was my first grand slam win. Australian Open was my first tournament without a coach, just to see how things would be.

''And then defending the Wimbledon title was something I had never done. Now winning my first US Open - it puts an end to a great season.''

He is the first player to win Wimbledon and the US Open in the same year since Pete Sampras in 1995.

And with the victory, the Swiss world number one improves his grand slam record since the 2003 French Open to 32-2.

It has also prompted many, including Hewitt, to suggest he could be on his way to surpassing the Pete Sampras record of 14 majors.

''He's definitely got a chance, especially the way his style is as well. He can play on all surfaces,'' said Hewitt.

Federer is the first man since Mats Wilander in 1988 to capture three grand slams in one season, emulating the Swede's successes at the Australian Open, Wimbledon and the US Open.

Until the match, no one had secured four grand slams in two calendar years since Sampras did it back-to-back in 1993-94 and 1994-1995.

In terms of majors, the French Open is now Federer's last frontier.

If he can triumph on the clay at Roland Garros next year, he will join Don Budge, Fred Perry, Roy Emerson, Rod Laver and Andre Agassi as the only players to sweep the majors.

l Andrew Murray is confident of making a major impression at the highest level after becoming the first Briton to win the US Open boys' title in New York.

But the Dunblane 17-year-old insists comparisons with Tim Henman are premature as he prepares to enter the senior ranks.

Murray capped a superb season for the Britain's emerging juniors with a 6-4 6-2 final win over Ukrainian Sergiy Stakhovsky.

Compatriot Miles Kasiri had already made headlines this year by reaching the final of junior Wimbledon.

Murray said: ''I've been compared to Tim a lot and to be compared to someone who has been in the top ten for six or seven years is great.

"But I'm just at the bottom of the ladder and I need to try to work my way up. I think I can do it - but just now I'm nowhere near as good as Tim is.''

Murray does not lack self-belief as he begins to attempt to emulate Henman's major achievements.

Not content with becoming Great Britain's youngest Davis Cup squad member in Austria next month, he is determined to squeeze Greg Rusedski out of a singles berth