Giant killer Del Potro believes he is the biggest tennis star on the circuit

New York, Sep.16 (ANI): Argentine tennis player Juan Martin Del Potro still can't believe he has won this US Open, but now believes he is the biggest new star in tennis.

"It's my best sensation," he said. "Since my childhood I have dreamed of this trophy. I have realised my dream. It is an incredible moment. It's amazing match, amazing people. Everything is perfect. Maybe tomorrow, maybe next week I will be believing in this. Now, I can't believe it," The Mirror quoted Del Potro, as saying.

The 6 ft 6in Argentine caused a massive upset by beating a fustered Roger Federer in five thrilling sets in the US Open final.

The world No.1, the reigning French Open and Wimbledon champion, was seeking his sixth successive title after winning 40 consecutive matches at Flushing Meadows.

But he was simply battered into submission by the 20-yearold with a murderous forehand making his first appearance in a Grand Slam final. Despite a horrible start, Del Potro triumphed 3-6 7-6 (7/5) 4-6 7-6 (7/4) 6-2 in four hours and six minutes - the longest US Open final for 20 years. (ANI)