Federer could be on track to smash Sampras’ record

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 on Sunday 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, immediately after the winning his first four grand slam finals.