BUENOS AIRES, Feb. 20 (UPI) -- Peru's Luis Horna, ranked 50th in the world, upset top seed David Nalbandian in his home country Tuesday at the Copa Telmex tennis tournament.
Horna posted a 6-4, 6-3 win in the round-robin tournament in the first meeting against his Argentine opponent.
In another round-robin upset, Spaniard Albert Montanes defeated third-seeded Argentine Agustin Calleri 6-7 (4-7), 6-4, 6-4.
Calleri, who was the runner-up here in 2002, beat Montanes last week in Costa do Sauipe
In other round-robin action, fourth-seeded Spaniard Nicolas Almagro beat Argentine Martin Vassallo Arguello 7-5, 6-4; fifth-seeded Spaniard Carlos Moya beat Italian Potito Starace, 6-4, 6-4; and Ecuador's Nicolas Lapentti beat France's Nicolas Devilder 6-3, 2-6, 6-3.
Moya is the defending champion and also won in 2003 and was the runner-up in 2004.
