Rodgers was delighted to complete the transfer and believes Alberto can follow in the footsteps of January signing Coutinho, who made an instant impact at Anfield after arriving from Inter Milan.
The boss told talkSPORT: "He's another Coutinho-type. We brought in young Philippe Coutinho in January when he was 20 years of age but he had good experience and more importantly fitted the profile of what we're trying to do here and what we're trying to build.
"He's a big talent and one for now that can play. He's got competitive games behind him and is one we see progressing over the next few years.
"Importantly, he knows the type of game and model we're trying to work in."