The Brazilian was pleased with how the Reds defended during a midweek trip to Red Bull Salzburg in the Champions League
Alisson insists that added focus was the key to Liverpool finally recording back-to-back clean sheets after they booked their place in the Champions League knockout stages.
Jurgen Klopp's men finished top of Group E by beating Red Bull Salzburg 2-0 in Austria on Tuesday.
A Naby Keita header gave Liverpool the lead in the 57th minute at Red Bull Arena, before Mohamed Salah doubled their account with a wonderful finish from a tight angle moments later.