Defending champion Novak Djokovic beat Joao Sousa 6-1 6-4 6-3 to reach the third round of the French Open.
The second seed raced through the first set but Sousa dug in and had a chance to lead 4-2 in the third.
But the Portuguese player missed his chance and Djokovic sealed victory in two hours and seven minutes to set up a clash with Argentine Diego Schwartzman.
Nine-time champion Rafael Nadal is playing Dutchman Robin Haase on Philippe Chatrier Court.