Vina del Mar, Chile – Sixth-seeded Santiago Giraldo of seeded Italian Filippo Volandri were both upset Monday in the first round of the $398,250 VTR Open tennis event.
Giraldo was knocked off by Argentina's Leonardo Mayer, who needed just 91 minutes for a 7-6 (7-5), 6-1 win at Club Naval de Campo Las Salinas.
Last year, Giraldo made the clay-court final but lost to Spaniard Tommy Robredo, who is not defending his title this week.
Brazil's Joao Souza rallied to dismiss Volandri in three sets, 1-6, 7-5, 7-6 (7-5); while Russia's Igor Andreev topped Chile's Paul Capdeville 3-6, 6-3, 6-4 in the day's third and final match.
Tuesday's schedule will feature matches for Chileans Fernando Gonzalez and Nicolas Massu. Gonzalez has won this event four times and was a runner-up in 2005, while Massu is a two-time Vina del Mar finalist.
This week's top seeds are Argentines Juan Monaco and Juan Ignacio Chela.
The 2012 Vina del Mar champion will collect $71,900.
