Coria, who has not dropped a set during his winning streak, is aiming for his third title in as many weeks and fourth of the year.
The 21-year-old has won 22 of his last 23 matches on clay.
Christophe Rochus will be Coria's second-round foe after the Belgian completed his rain-delayed match against Argentine Federico Browne, 6-3, 6-3.
David Nalbandian of Argentine dispatched Swiss veteran Marc Rosset, 6-2, 6-4. Nalbandian next faces Spain's David Ferrer, a 7-6 (7-2), 6-2 winner over Czech Bohdan Ulihrach.
Most of the women's first-round action got underway.
Third seed Anna Pistolesi of Israel posted a 6-3, 5-7, 6-2 triumph over Henrieta Nagyova of Slovakia.