Vinci into Acapulco QFs

Top seed Roberta Vinci secured a spot 5, 6-4 at the $220,000 Mexican Open on Wednesday.

The top-seed used three aces to oust Gacon in one hour, 45 minutes on the red clay at The Fairmont Acapulco Princess.

Second-seeded Flavia Pennetta of Italy battled back to avoid an upset against Sofia Arvidsson of Sweden. Arvidsson won the first set 6-2 and took Pennetta all the way to a tiebreaker in the second set with a chance to win. However, Pennetta held on to win the second set and cruised in the third for a 2-6, 7-6 (7-5), 6-1 victory in just over two hours.

Pennetta won this event in 2005 and 2008 and was runner-up in 2004, 2006, 2007 and 2009. She's appeared in six of the last eight finals at the tournament, while Arvidsson was fresh off her title in Memphis last week.

Third-seeded Italian Sara Errani cruised in her match, straight-setting Romanian Edina Gallovits-Hall 6-4, 6-1 in just over an hour of work, while Gallovits-Hall's compatriot, fourth-seeded Romanian Irina-Camelia Begu, blitzed Georgian Anna Tatishvili 6-3, 6-1 to advance to the quarterfinals.

The second-round saw two favorites upset as sixth-seeded Johanna Larsson of Sweden fell 4-6, 6-1, 6-3, at the hands of Colombian Mariana Duque-Marino and eighth-seeded Italian Alberta Brianti was ousted 6-3, 3-6, 7-6 (7-2) in a thriller by Michaella Krajicek of the Netherlands, who used nine aces to top the Italian.

In second-round play not involving seeded women on Day 3, Spanish lucky-loser Estrella Cabeza Candela topped Hungarian Melinda Czink, 6-4, 7-6 (7-5) and Slovakian Magdalena Rybarikova knocked off Ximena Hermoso of Mexico, 6-3, 3-6, 6-3.

This year's Acapulco champion will collect $37,000.