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Dominic Thiem moves on at Argentina Open; David Ferrer ousted

BUENOS AIRES, Argentina -- Top-seeded defending champion Dominic Thiem of Austria advanced to the Argentina Open quarterfinals Thursday, beating Germany's Maximilian Marterer 6-4, 6-4.

Thiem will face Uruguay's Pablo Cuevas, a 6-4, 7-5 winner over Portugal's Joao Sousa.

Fourth-seeded Diego Schwartzman of Argentina beat Slovenia's Aljaz Bedene 6-4, 2-6, 6-2 to set up a match against Spain's Albert Ramos-Vinolas. Ramos-Vinolas beat compatriot David Ferrer 3-6, 7-6 (9), 6-3.

Ferrer, 36, said he planned to retire in May at the Madrid Open. His participation in the Buenos Aires tournament is one of the last of his career.