Liverpool manager Jurgen Klopp has praised Alisson for his debut performance against West Ham United.
The Brazilian kept a clean sheet as the Reds ran out 4-0 winners at Anfield.
"Alisson played a fantastic game, being really concentrated. We all expect these boys to act like machines but they are not, they are human beings," he said.
"In the first game you could be nervous. Obviously both [Alisson and Keita] were not nervous, which is good. Especially in our possession, he was a very dominant figure."