The five-time U.S. Open champion needed just 95 minutes on Arthur Ashe Stadium court to dispatch his overmatched opponent and secure a spot in the third round on the year's final grand slam.
The Swiss master, the all-time leading grand slam singles winner with 17 titles, is seeded seventh after slipping in the rankings while hampered by injury and is on a collision course to meet world number two Nadal in the quarter-finals.
Federer will next play either 26th-seeded American Sam Querrey or Adrian Mannarino of France.
(Reporting by Larry Fine)
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