RIO DE JANEIRO -- Third-seeded Cristian Garin of Chile advanced to the Rio Open quarterfinals Wednesday, beating Argentina's Federico Delbonis 6-4, 6-3.
Garin will face Argentina's Federico Coria, a 6-4, 4-6, 6-4 winner over Spain's Carlos Alcaraz Garfia.
Home favorite Thiago Monteiro dropped out with a 1-6, 6-1, 6-4 loss to Hungary's Attila Balazs.
Balazs will face Pedro Martinez, a 6-1, 6-4 winner over Spanish countryman Pablo Andujar.
Top-seeded Dominic Thiem of Austria will play his round of 16 match Thursday against Spain's Jaume Munar.