Djokovic falls in US Open first round, earliest Grand Slam exit in 20 years

Ailing Novak Djokovic suffered his earliest Grand Slam exit in 20 years on Sunday, falling in five brutal sets to Mariano Navone in the first round of the US Open.It also ended his run of 78 Grand Slam first-round victories, a streak stretching all the way back to Djokovic's 2006 loss to Paul Goldst

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