Top-seed Pennetta advances at Estoril Open

LISBON, Portugal, May 1 (UPI) -- Top-seeded Italian Flavia Pennetta was a first-round winner Monday at the women's Estoril Open in Portugal.

Pennetta needed three sets to stave off Russian Elena Vesnina 6-2, 2-6, 7-6 (7-2).

In a pair of upsets, Italian Antonella Serra Zanetti beat fifth-seeded Russian Vera Dushevina 6-4, 6-4, and Argentine Mariana Diaz-Oliva defeated ninth-seeded Virginie Razzano of France 3-6, 6-4, 6-4.

In another opening-round match, Argentine Paola Suarez defeated Spaniard Maria Sanchez Lorenzo 7-5, 6-3.