Hrbaty, a finalist in the tournament in 2004 and the No. 1 seed this week, was dumped by Albert Montanes, who won 7-6 (7-5), 6-3 in the clay-court event. No. 2-seeded Acasuso was also ousted in straight sets, losing to Paul-Henri Mathieu 7-6 (7-5), 6-4.
The tournament's No. 3 seed also fell Friday, although Julien Benneteau's defeat at the hands of fifth-seeded Marc Gicquel wasn't a huge upset. Gicquel won 3-6, 6-1, 6-1.
Saturday's semifinals send Gicquel against Mathieu and Montanes against Ramirez Hidalgo.
Swim Week Miami Beach 2014 [PHOTOS]