Just as in the first round against Indian Sumit Nagal, five-time US Open champion Federer dropped the first set under the roof. Matches on other courses were stopped because it rained in New York.
The 38-year-old served heavily and decided when Dzumhur hit the return line over the baseline and the match was over after 2.21. Federer relied on the serve, putting in 16 aces and getting 81 percent of the first serve.