Sao Paulo, Brazil (SportsNetwork.com) - Fifth seed Robin Haase and seventh seed Leonardo Mayer were losers in the first-round Monday at the Brasil Open tennis event.
Brazil's Joao Souza cruised in a straight-set win over Netherlander Haase 7-5, 6-4 at this clay court tournament.
Guido Pella outlasted his fellow Argentine Mayer in three tiebreak sets, 7-6 (7-4), 6-7 (3-7), 7-6 (7-4), in 2 hours, 33 minutes.
The last match of the night saw Argentina's Horacio Zeballos take down Uruguay's Pablo Cuevas 7-6 (7-3), 3-6, 6-3.
This week's top seeds in Brazil are German Tommy Haas and three-time champion Nicolas Almagro of Spain.