Novak Djokovic loses in opening round of US Open for first time, falling in 5 sets to Mariano Navone

Novak Djokovic grinded through physical and internal ailments, made one mistake after another and could not find what it took to beat a feisty, younger opponent who was not intimidated under the lights against tennis' most decorated player. The 39-year-old is out of the U.S. Open after a first-round

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