Liverpool kept their sixth clean sheet of the season as they moved 16 points clear at the top by beating Tottenham 1-0.
Sure, it helped that Jose Mourinho's side spent much of the game parked in front of their own goal, but Alisson did keep out their four attempts on target.
For all the plaudits he's received this season - including the Yashin Trophy - there's still an argument he's one of the unsung heroes of the Reds' incredible 2019/20 campaign.
Speaking after the game, Gary Neville suggested that might be because the Brazilian is so calm and collected between the sticks.
"Going back to the point about the goalkeeper, because I played with great goalkeepers like Edwin van der Sar and played with Peter Schmeichel, who made things look easy," Neville explained.
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"Some of those saves that Alisson made today where he just scooped them into his arms and fell on the floor, and it just made it look like a routine catch. Honestly, no word of a lie, because of his positioning, his anticipation, he's in a position to make it look like that.
"Other goalkeepers in the Premier League that we see, would have been flailing across there, diving, parrying it across, and the fans behind the goal would be saying 'great save' and we'd be saying 'what a save from the goalkeeper'. But it's not.
"The really top goalkeepers make the most simple things look cool, calm, they give authority to the whole defence.
"And you're right to mention Alisson because I think today he was a bit part of that game. He just didn't give Tottenham a sniff."
Mourinho's game plan was clear. While Spurs went with three at the back, in reality they typically had a five-man backline - at the very least - for large spells, hitting Liverpool on the break when they could.
The north Londoners' long balls were largely ineffective with 5"6 Lucas Moura leading the attack, though there were times when Son Heung-min's pace threatened to expose the gaps left by the visitors' roaming full-backs.
When Tottenham did manage a breakthrough, Alisson was always there to stop them - even right up by the halfway line. The 27-year-old made a superb headed clearance despite at least two of his teammates being ready to run with Moura.
For any other stopper, it would look like a moment of madness, but Alisson executed it perfectly:
That was his 24th sweeper clearance of the season and one that really does reinforce his reputation as the best goalkeeper in the world right now.
Alisson has also dribbled passed more players this season than Christian Eriksen. That's not just an indictment of the want-away Spurs playmaker, whose performance against the league-leaders was so ineffective and nonchalant that he was jeered off by his own supporters when he was replaced in the second half.
It's a reflection of Alisson's ability on the ball too, a key reason why he can command so much of Liverpool's half and allow his defence to move forward.
Behind every great team, there's a world-class goalkeeper and Alisson is the perfect example.News Now - Sport News