Alisson made his Anfield debut last night in Liverpool’s victory over Torino.
Carragher told Sky Sports: “The goalkeeping situation has given everybody a massive lift.
“What happened in the Champions League final with Loris Karius, yes it was disappointing for the Liverpool supporters on the night losing that game, but we’ve all been there as players where you have a poor game. But it’s happened in a game which will, unfortunately, be remembered for a long time.
“Hopefully he will go on to be a great goalkeeper and be remembered for that but Liverpool had to make a change because I think there would be no belief in Liverpool actually, never mind winning a league but challenging for the league with the two goalkeepers they had.”