Juan Martin del Potro of Argentina holds up the trophy after defeating Roger Federer of Switzerland in the men's final at the U.S. Open tennis championship in New York, September 14, 2009. REUTERS/Shaun Best

Juan Martin Del Potro overcame a two sets to one deficit in a hard fought match to beat Roger Federer, the world's No. 1 player, at the 2009 U.S. Open.

Just 20 years old, Del Potro faced off against the 28 year old five-time U.S. Open champion, winning with a final result of 3-6, 7-6, 4-6, 7-6, 6-2.

I would like to congratulate Juan Martin … he was the best, Federer said in a post match interview just ahead of Del Potro's turn.

Of course I would have loved to win, Federer said. However he thanked fans and noted he never thought he would have won 40 matches in row at the Open.

Federer, who smiled during the interview as his wife looked on with a serious expression, held the runner up trophy aloft.

The focus then turned to Del Potro at center court where the interviews and awards were being handed out.

I want to congratulate Roger, Del Potro said.

After sportscaster Dick Enberg noted Del Potro was only the second Argentine to win the award, Del Potro said it was amazing for South America.

I think this will be in my mind forever in my life, he added.

He earned a $1,850,000 award and a new luxury car.

After initially being rebuffed when he attempted to speak in Spanish due to time constraints he was allowed after asking a second time.

I want to thank my team, that this would not be possible (without them), the Argentines who are here, especially my mother and father, Julieta and all my friends and all the people who supported me all the time. This was for you, he said.