Alisson has revealed Liverpool teammate Mohamed Salah has "started the season hungry".
The Egyptian forward banged in a hat-trick to help Liverpool overcome a plucky Leeds outfit with a 4-3 victory.
And Alisson admits he sees determination in Salah's attitude ahead of Liverpool's title defence.
"He's hungry, he's started the season hungry and I'm happy because of this. He's a really important player for us," Alisson told the club's website. "This gives him confidence and also pushes the other players to work even harder.
"We have a lot of quality with our front three. Sometimes just one scores but we know that everybody can improve from this game in the defensive phase and in attack. It's a good start for us.
"We know what we were waiting for and what their [Leeds'] attitude would be on the match.
"I think they are a really good team with good quality but with a brave heart also. They made our night difficult tonight but I think their night was even more difficult because of the way we played.
"I'm happy to have Mo Salah on the team and that he scored a hat-trick in the first official match of the season. I'm really happy for the three points also."
