Spain's Verdasco, ranked eighth in the clay-court tournament, held off a strong challenge from fifth-seeded Grigor Dimitrov in Saturday's semi-final.
Verdasco came from behind and broke the Bulgarian's serve in the third set to win 7-6 (7/3), 5-7, 7-5.
In the day's second match, Argentina's Berlocq beat Thiemo De Bakker of the Netherlands 7-5, 6-3.
Results from the sixth day of the Swedish Open on Saturday (x denotes seeding):
Carlos Berlocq (ARG) bt Thiemo de Bakker (NED) 7-5, 6-3
Fernando Verdasco (ESP x8) bt Grigor Dimitrov (BUL x5) 7-6 (7/3), 5-7, 7-5