De Bakker, seeded sixth, fired 11 aces en route to a 7-5, 6-0 win over Marc Lopez. De Bakker won 61 percent of the points in the match and dropped only nine points in the second set.
The seventh-seeded Troicki had four service breaks in eight receiving games in posting a 6-3, 6-1 victory over Marco Chiudinelli. Troicki lost only 12 points in his eight service games.
In other first-round matches Monday, Florent Serra needed more than 2 1/2 hours to escape Teymuraz Gabashvili 6-7 (1-7), 6-4, 6-4; and Daniel Brands topped Illya Marchenko.
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