Below you will find the solution for: At the 2009 U.S. Open Juan Martín del Potro knocked off this reigning world No. 1 Swiss player in 5 sets Jeopardy .
Since you already solved the question At the 2009 U.S. Open Juan Martín del Potro knocked off this reigning world No. 1 Swiss player in 5 sets which had the answer FEDERER, you can simply go back at the main post to check the other answers. You can do so by clicking the link here Jeopardy February 29 2020
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