Federer, playing his first tournament of the season, wasn't troubled in his match with the American player as he seeks his seventh Australian title. Federer won his first in Melbourne in 2004.
Novak Djokovic began his bid for an eighth Australian Open title with a 7-6 (5), 6-2, 2-6, 6-1 win over Jan-Lennard Struff in the last of the matches to finish on a rain-interrupted first day of the tournament. The defending champion had to deal with a leaky roof as drops of water slowly dripped onto the court behind one baseline and had to be regularly wiped away by ball kids. It was only a minor distraction as he registered his 900th tour-level match win.
Meanwhile, No. 13-seeded Denis Shapovalov is out of the Australian Open after losing in four sets to Marton Fucsovics. Shapovalov, a 20-year-old Canadian, lost 6-3, 7-6 (7), 6-1, 7-6 (3). Shapovalov berated the umpire and received a code violation during his ill-tempered match on Margaret Court Arena. The blowup came after the third set.
After throwing his racket, Shapovalov was given the code violation that triggered his outburst.
"I didn't break it. If I break it, 100% code me," Shapovalov yelled at umpire Renaud Lichtenstein. "You're not doing your job. You're just finding reasons to code me."
Fucsovics also beat the 13th seed last year at Melbourne Park, that time Sam Querrey in the second round.
"Usually this is not a lucky number, but for me, my favorite number," he said. "I played some of my best tennis today. Everything was working well."
The Associated Press contributed to this report.