Belgian goalkeeper Simon Mignolet dropped further down the Liverpool pecking order this week.
The 30-year-old stopper - who has made 202 appearances since joining from Sunderland in 2013 - was replaced by Loris Karius as Jurgen Klopp's number one during the 2017-18 season.
Karius lost the confidence of the Liverpool supporters after making two huge mistakes in the Champions League final.
Liverpool finally reacted by splashing out a world-record fee of £66m to sign Alisson from Roma.
The Brazilian goalkeeper described it as a "huge step" in his career and promised to give his all for his new employers.
Alisson said: "I'm really happy, it's a dream come true to wear such a prestigious shirt for a club of this size that is used to always winning.
"In terms of my life and my career, it's a huge step for me being part of this club and this family. You can be certain that I'll give my all."
The future looks bleak for Mignolet on Merseyside.
Amid surprising links to Barcelona, Mignolet's agent was asked about the impact Alisson's arrival will have on his client.
Nico Vaesen told Belgian news outlet Walfoot, as per Goal: “It doesn't change the situation [Alisson's arrival].
“Our goal is to find a solution for Simon to play and Alisson's arrival doesn't change that.
“We know that a player of €60-70million won't find himself on the bench. We are looking at the situation and looking for a solution to his playing time.
“There are options, the next few days will be decisive.”
It seems that Mignolet has played his final game in a Liverpool shirt.
During the World Cup, the Belgian goalkeeper admitted that he would be weighing up a summer switch.
He said: “I didn't play in the last few months at Liverpool, so after the World Cup I will look at everything. I can't say much more.”
Klopp described Alisson as a "world-class goalkeeper" following his arrival from Italy.
"We've had talks over the last few days and that's good," said the German manager. "We didn't sign him because he is good looking and a nice fella and his English is good and all that stuff - we signed him obviously because he is a world-class goalkeeper.
"We are really happy that the club gave us the opportunity to do so."