Carlos Berlocq, Grigor Dimitrov advance in Bastad
Berlocq broke Zeballos' serve three times.
Earlier Monday, Bulgaria's Grigor Dimitrov rallied to beat 17-year-old Elias Ymer of Sweden 5-7, 6-2, 6-4.
Argentina's Martin Alund defeated Sweden's Markus Erikson 7-5, 6-7 (5), 7-6 (8) to advance to the second round of the clay-court tournament.
Copyright 2013 by The Associated Press
This story is from ESPN.com's automated news wire. Wire index
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