Three of the four second-round matches on Wednesday's schedule in Brazil went three sets and the players combined for about 10 1/2 hours of tennis.
Ferrero, from Spain, defeated Nicolas Massu 6-2, 5-7, 6-2 in nearly 2 1/2 hours. He didn't face a break point in the first or third sets but had his serve broken three times in dropping the second.
He earned a quarterfinal slot against Carlos Berlocq, a 7-6 (7-5), 6-2 winner Wednesday over Juan Ignacio Chela in a battle between Argentines. The match took more than two hours -- lengthy for a straight-set decision.
Fourth-seeded Russian Igor Andreev also needed three sets to get out of the second round, beating Rui Machado 6-2, 5-7, 6-4 while sixth-seeded Uruguayan Pablo Cuevas played for nearly 3 1/2 hours before escaping Frederico Gil's challenge 7-5, 6-4, 7-6 (7-3).
Andreev and Cuevas will meet in the quarterfinals.
Copyright 2010 United Press International.