Allison has become the most expensive goalkeeper in history after Liverpool paid Roma £65million to land Brazil's No 1.
This is a huge statement of intent from Liverpool and takes their spending for this window to £174.45million on the back of deals for Guinea midfielder Naby Keita, Brazil international Fabinho and Switzerland forward Xherdan Shaqiri.
Alisson arrived on Merseyside on Wednesday and underwent a medical at Liverpool's Melwood training base.
He signed a six-year deal before heading back on a private jet to Italy to conclude the remainder of his holiday.
Liverpool first asked Roma about Becker in January but were initially quoted a fee of £90million.
They moved swiftly for the 25-year-old at the beginning of this week when Chelsea – their main rivals for his signature – were trying to sell Thibaut Courtois to Real Madrid.
With Allison becoming world's most expensive keeper yet, we take a look at other keepers who have broken the transfer records before.
1. Ederson, Benfica to Manchester City in 2017, £35million
Alisson’s countryman became the most expensive keeper (in pounds) when he joined City last summer. The 24-year-old quickly established himself as Pep Guardiola’s first choice and impressed throughout the season, both with his shot-stopping and distribution, as City coasted to the title.
2. Gianluigi Buffon, Parma to Juventus in 2001, £32.6million
The Italian (who remained the most expensive keeper in euros prior to Alisson’s move) was considered a pricey upgrade on the similarly great Edwin van der Sar when, aged 23, he left Parma. Seventeen years later his stay in Turin has finally come to an end, with Buffon moving to Paris St Germain. In an era when there has been significant competition from Iker Casillas in particular, Buffon will likely be remembered as the greatest keeper of his time.
3. Jordan Pickford, Sunderland to Everton in 2017, £30million
The most expensive English goalkeeper is 24-year-old Pickford, who grew stronger during his maiden season at Goodison Park after bursting onto the scene at Sunderland. He will start the new season with his reputation – and value – significantly enhanced by a stellar showing for England at the World Cup.
4. Bernd Leno, Bayer Leverkusen to Arsenal in 2018, £22million
Leno ended seven years at Leverkusen by signing for the Gunners, where he will hope to replace Petr Cech as number one, in June. The 26-year-old made more than 300 appearances for Leverkusen and was the youngest German goalkeeper to play in a Champions League match when he faced Chelsea in September 2011. Missed out on the Germany World Cup squad.
5. Manuel Neuer, Schalke to Bayern Munich in 2011, £19million
Widely considered the best keeper in the world for a number of years, the 32-year-old is renowned for his abilities not just with his hands but also his feet. Neuer won the Champions League with Bayern a year before helping Germany to victory at the 2014 World Cup. Spent most of last season on the sidelines because of a foot injury.
-Dailymail