Federer improved to 65-5 since returning from a left knee injury last year with his third-round victory in a rare day match. The Swiss star's young son, Lenny, watched from a box wearing a Superman cap.
What he saw was his 36-year-old father overcome a shaky first set in which there were four breaks of serve. Federer hit a running forehand passing shot to break at love and take the set 6-2. Federer cruised to a 3-0 lead in the second and closed out the win in 58 minutes.
"I was playing aggressive and feeling like he was not loving my slice," said Federer, who owns the No. 1 ranking. "I was able to mix up my game nicely, make it difficult for him."
"I think the beginning of the matches are always important, get off to a good start," Federer said. "I did that."
In other matches, Borna Coric of Croatia upset No. 13 Roberto Bautista Agut of Spain 6-1, 6-3; Jeremy Chardy beat No. 20 Adrian Mannarino 7-5, 4-6, 6-1 in an all-French matchup; and No. 11 Pablo Carreno Busta of Spain defeated Daniil Medvedev of Russia 6-1, 7-5.
Information from The Associated Press was used in this report.