World No. 1 and defending champion Roger Federer, on Monday, returned to court to finish a rain-interrupted clash, winning the four games he needed to defeat Federico Delbonis.
The Swiss great needed an hour to seal his second round victory 6-3 7-6 (8-6), one that will see him face 25th-seed Filip Krajinovic in the third round.
Federer’s title defence got off to a soggy start on Sunday when play was suspended because of rain showers with Federer a set up and tied 2-2 in the second.
“It’s been a long time since I have been interrupted at night and have to come back the next day,” said Federer.
“In the night-time, the ball is much more deader. The surface doesn’t react so much.”
Federer is making his 17th appearance at the BNP Paribas Open and is assured of remaining atop the ATP rankings if he makes it to the semi-finals in the California desert.
Elsewhere, Frenchman Gael Monfils survived a match point before beating big-serving American John Isner 6-7(5) 7-6(3) 7-5 in a contest that had only one break.
Croat second seed Marin Cilic beat Hungarian Marton Fucsovics 7-5 6-3, while Canadian Milos Raonic defeated 17-year-old compatriot Felix Auger-Aliassime 6-4 6-4.
Argentinian Juan Martin del Potro continued his good run of form, sealing a third round berth with an impressive 6-2, 6-1 win over Australian Alex De Minaur.
Meanwhile, Japan’s Kei Nishikori withdrew from the tournament through illness.