Federer returned to stadium court today afternoon and needed an hour to finish off his second round victory 6-3, 7-6 (8/6).
His title defence got off to a soggy start Saturday night when play was suspended because of rain showers with Federer up a set and tied 2-2 in the second.
The storm clouds rolled in just before the start of their match on Saturday and after a short delay to start the first set they managed to play until the heavy rains came in the second. After another 90-minute delay organizers suspended play for the night.
He extended his 2018 win streak to 13 matches and has only dropped three sets from 34 played this year.
Federer will face 25th-seed Filip Krajinovic in the third round.