Mariano Navone ousts Novak Djokovic in 1st-round shocker at U.S. Open

Unseeded Mariano Navone stunned No. 4 seed and four-time U.S. Open champion Novak Djokovic 7-6 (5), 5-7, 4-6, 6-2, 6-1 on the first day of the Grand S