Első Gs döntőjét megnyerte 20 évesen. 0-1 majd 1-2 es szettek állásáról, a legyőzhetetlennek hitt 41-0-ás US open győztes mutatóval rendelkező 15* GS bajnok Federert, aki legeredményesebb férfi teniszezője a világnak. Új csillag született, nem kérdés!
2009 US open döntő eredménye:
Del Potro-Federer 36 76 (4) 46 76 (3) 62
Mivel a friss, ropogós videóból alig értek valamit, a twitteren egy jótét lélek lefordította angolra...tehát:
"Hello everyone. wanted to say hello and tell you the process these days, as everyone knows, by the viral'm not playing for a while, I also lost several important tournaments. Not a good time of the season to stop because they are very demanding tournaments, very important tournaments for the year but did not meet 100% physically felt he was not able to go play, obviously that's also greatly influences the psychic because the illusions are great. But I think I also found the time I spent here in Argentina I found myself more with my family and friends who are ultimately the people who are always, always right and wants to see me at home supporting me time so I could enjoy that and I gave many forces today to tell you that I feel better health, I am going to train and although I'm still not at my best, I think I'm on track to be better in the next tournament and give the best of me as I try to do every time I compete. I wanted to tell you that, let this message. I'll be playing at Queen's next week, which for me is very good although not at my best. As told above is a process with a lot of training, hard work and with the support of the people I'll want to be in that place I love to be and I train every day to enjoy and that you enjoy it too .
I send a big salute, thank you for accompanying me, supporting me and giving me the encouragement that helps a lot. A big hug".