The former world No. 1 is making a cautious return to the ATP Tour after stopping his 2017 season following Wimbledon, due to a right elbow injury.
Federer, who had looked slightly off his game in his rain-disrupted third-round match against Federico Delbonis, was his dominant self yesterday, winning 89 per cent of his first service points while cracking six aces to just one double fault. Very weird. I mean, I just completely lost rhythm, everything.
Daniel sent an out-of-sorts Djokovic tumbling with a hard-fought 7-6 (7/3), 4-6, 6-1 victory. He had surgery in Switzerland shortly after that. 'I think it speaks to my strengths on court, which is just being clutch and playing my best tennis in the big moments'.
Novak Djokovic and British No1 Kyle Edmund suffered disappointing defeats at Indian Wells on Sunday.
It was another snag in the return for world No. 13 Djokovic, who admitted he lacked composure while playing in just his second event of 2018 and first since having surgery. That is as head scratching as anything you'll see'.
Djokovic even looked ready to take a quick early lead on Stadium One, where he has won five singles titles on the hard courts where his elastic athleticism is best expressed.
"I can't believe I beat someone like (Djokovic) on center court like this, it's pretty insane", Daniel said. "The surface doesn't react so much; the ball doesn't travel so fast".
Stephens lost to Daria Kasatkina of Russian Federation 6-4, 6-3, and fell to 2-4 in matches this year.
Isner, the 15th seed, frittered away seven break points, while Monfils converted one of his three opportunities, which proved enough.
Yuki Bhambri of India pulled off a surprise when he toppled ninth-seeded Frenchman Lucas Pouille 6-4 6-4.
Naomi Osaka continued her strong showing at the tournament on Sunday night, booking her ticket to the round of 16 with a 6-3, 6-3 win over Sachia Vickery of the United States.
In late action, 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.