Liverpool's No. 1 goalkeeper made 9 saves to prevent PSG from scoring, before Harvey Elliott scored to give Liverpool a big advantage in the second leg. PSG controlled the ball 72%, launched 27 shots but eventually lost to Liverpool - the team that only had 2 shots in the match.
PSG have been in impressive form recently and are confident of beating Arne Slot's Liverpool at home. However, home team strikers such as Ousmane Dembele, Bradley Barcola and Khvicha Kvaratskhelia could not find a way to get past Liverpool's goalkeeper.
When asked if he felt it was his best performance of the season so far, Alisson told TNT Sports: "Yes, it was probably the best performance of my life. The coach emphasized that we will have many difficulties when facing PSG, they control the ball very well.
We have suffered a lot. People can see that clearly when they watch the clips in the match. But Liverpool also showed their quality, we worked hard."
Alisson's nine saves are the most for a goalkeeper to keep a clean sheet in a single Champions League game this season.
"All the team's efforts and finally, Harvey coming on and scoring, it's unbelievable. This is a great result for us, Alisson added.
Coach Arne Slot praised his goalkeeper after Liverpool's surprise victory in Paris.
I didnt think I would have worked with a goalkeeper of the highest level like Alisson Becker, he said. I have had some very good players as coach, but I have never had the best goalkeeper in the world. I think Alisson is that person. He showed his qualities today.
Goalkeeper Elliott praised his teammates after he created the decisive moment of the match with his first touch, just 47 seconds after he came off the bench.
He said: "To be honest, the victory is the result of the whole team. PSG were tired at the end of the match, because they had created many opportunities before. The defense and Alisson helped us win.
I think it was a very solid game defensively, and I was the one who took the opportunity and luckily it worked."
The return match between Liverpool and PSG takes place at 3:00 a.m. on March 12.
