VINA DEL MAR, Chile -- Eighth-seeded Federico Delbonis of Argentina defeated Uruguay's Pablo Cuevas 6-3, 6-4 on Tuesday to reach the second round of the Royal Guard Open in Chile.
Paolo Lorenzi of Italy also advanced, beating Colombia's Alejandro Gonzalez 6-2, 6-1.
The top four seeded players, who received byes into the second round, are Fabio Fognini (1) of Italy and three Spaniards -- Tommy Robredo (2), Nicolas Almagro (3) and Marcel Granollers (4).
The tournament kicks off four weeks of play in clay-court events around Latin America.
Rafael Nadal has skipped the event after playing there a year ago, but is expected to play next week in Buenos Aires.