Jurgen Klopp admits Alisson worth twice the money he was bought
The lead was maintained into stoppage time when Napoli had a golden chance to put the Reds into the Europa League.
A cross during the stoppage fell to Arkadiusz Milik seven yards out with the Polish striker seemed certain to score.
But the Poland international was denied his strike by a crucial save from Alisson and Liverpool hung on to reach the last 16.
Liverpool splashed a huge £67milllion for Alisson in the summer and Jurgen Klopp is convince the Brazilian stopper worths twice that value.
"If I knew Alisson was this good I would have paid double," Klopp said.
"Mo Salah scored an unbelievable goal and I have no idea how Alisson made a save like this, it was amazing.
"We could have scored more, but the last chance Sadio Mane had made no difference in the standings.
"It was wild and there were lots of counter attacks but we were ready for that.
"If I knew Alisson was this good I would have paid double," Klopp said.
"Mo Salah scored an unbelievable goal and I have no idea how Alisson made a save like this, it was amazing.
"We could have scored more, but the last chance Sadio Mane had made no difference in the standings.
"It was wild and there were lots of counter attacks but we were ready for that.