Djokovic & Federer Advance To The Quarterfinals At The US Open

Top seed Novak Djokovic, opened his fourth-round match with a thrilling 16-14 first-set tiebreaker win over No. 22 seed, Alexandr Dolgopolov. Things got easier from there in a 7-6 (14), 6-4, 6-2 victory.

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