Italy's Paolo Lorenzi returns the ball to Argentina's Carlos Berlocq during the Davis Cup first round tennis match in Buenos Aires, Argentina, Sunday, Feb. 5, 2017. (AP Photo/Natacha Pisarenko)
Natacha Pisarenko
February 15, 2017

BUENOS AIRES, Argentina (AP) Gerald Melzer of Austria upset eighth-seeded Paolo Lorenzi of Italy 6-3, 6-3 in the first round of the Argentina Open on Wednesday.

No. 5 Albert Ramos-Vinolas came through his second-round match when Argentina's unseeded Leonardo Mayer retired in the third set with an injury. Ramos-Vinolas was leading 6-7 (4), 7-6 (3), 1-0 at the time.

Kei Nishikori of Japan is the top-seeded player in the clay-court tournament in the Argentine capital, and plays his second-round match late on Wednesday against Argentina's Diego Schwartzman.

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