Jack Draper will continue his Indian Wells title defence against Novak Djokovic after an impressive win on Monday - while Cameron Norrie claimed a major third-round scalp.
British number one Draper beat Argentina's world number 20 Francisco Cerundolo 6-1 7-5 to set up a last-16 meeting with 24-time Grand Slam champion Djokovic.
Djokovic, the world number three, overcame American Aleksandar Kovacevic 6-4 1-6 6-4 to keep his own campaign going.
British number two Norrie also reached the fourth round by upsetting the sixth seed, Australia's Alex de Minaur, 6-4 6-4.
Draper, 24, returned last week after an eight-month absence from the ATP Tour because of an arm injury.