Berlocq, ranked 74th in the world, dispatched his Spanish opponent 7-5, 6-1, improving to 1-1 in career finals.
His only other championship match appearance came last year at Vina del Mar in Chile.
The Argentinian converted 5-of-16 break-point chances and saved two of the four he faced en route to the victory.
Verdasco, meanwhile, has gone 0-6 in finals since his last title, which came at the 2010 Barcelona event.
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