Alba defeated Puerto Rican Juan Alvarez 0-1 in the over 80 kilograms division at the Juan Pablo Duarte Olympic complex in this capital.
In statements to Prensa Latina, the twice world champion commented that he had faced a high level athlete, although he felt comfortable despite being out of competitions for some time.
At around 4:00 p.m. local time, Alba will fight to improve his position in the final against a Venezuelan fighter.
In the over 80 kilograms division, Mexican Carlos Sansores dominated Esmerlyn Perez, from Dominican Republic, 2-0.
Meanwhile, Colombian Luis Soto overcame Daniel Thomson, from Trinidad and Tobago, 0-1, while Venezuelan Luis Alvarez beat 2-0 Honduran Miguel Ferreras.
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