The Brazilian was a high profile target for both sides but made a decision to join Jurgen Klopp's team and has impressed ever since.
The Reds' hopes of claiming a sixth European Cup were thwarted by holders Real Madrid, though they were ably assisted by two gaffes from the German keeper. "I've spoken about it before - it's not something that you want to be doing, but the team is doing so well and you just try to help the team as best as you can".
"I chose Liverpool for the same reasons I went to Roma when I left Brazil".
"What's life if not fighting for your dreams?".
But the truth is, if Karius didn't make those errors and Liverpool won the Champions League, Alisson may not be at Anfield right now.
The Editor of RomaPress.us, John has been covering Italian football as a freelance journalist for over 10 years and has appeared in various publications including ASRoma.com, EuroFantasyLeague.com, and ESPN.
One of the main reasons Liverpool now sit top of the Premier League by four points is their incredible defensive record.
Alisson has made some crucial saves and, barring his howler against Leicester early in the season, has been pretty much faultless.
Simon Mignolet's performance in nets in FA Cup action on Monday last served as a reminder of the importance of the club's No. 1 to their level of performances. "I don't celebrate it like any other goal", Alisson admitted.
"I know what goes through the mind of a goalkeeper in those kind of moments", he continued, "I was so sad to see what happened to Karius - it could have happened to anyone".
Alisson in an interview with Four Two Two, stated that he believed that a move to Liverpool was the best thing for his career at the time.