As a sweltering day turned into a soggy evening at the United States Open, there was no reason to believe that Roger Federer would have any trouble with John Millman in their fourth-round match in Arthur Ashe Stadium on Monday.
Millman, a 29-year-old Australian, was in the fourth round of a Grand Slam event for the first time. Federer had won 20 Grand Slam titles.
Federer was 40-0 at the U.S. Open against players ranked outside the top 50. Millman was ranked 55th.
