Souza defeated Robredo 6-4, 7-6 (7-5) by holding serve nine of 11 times in the match. Souza had two breaks in the first set in grabbing the advantage.
The second set was very even -- both players won 44 points -- but Souza was able to come through in the tiebreaker.
Frederico Gil rallied for a 2-6, 6-4, 6-3 victory over Jeremy Chardy in the other main draw match on Monday's schedule. Chardy won the first set easily and was tied 4-4 in the second when Gil ran off five straight games. That gave Gil the second set and control of the third.