Carlos Alcaraz claimed a straight-set victory over Fabian Marozsan to reach the quarter-finals and continue his title defence at Indian Wells.
The Spaniard needed 75 minutes to wrap up a 6-3 6-3 win against the Hungarian.
World number two Alcaraz is bidding to become the first player to defend the title since Novak Djokovic in 2016.
Elsewhere in California, Greek 11th seed Stefanos Tsitsipas fell to a surprise 6-2 6-4 defeat by Jiri Lehecka on Tuesday.
The Czech 32nd seed won his first ATP title in January by beating Britain's Jack Draper in the final of the Adelaide International.