The Brazil No.1 earned a then record-breaking transfer to Anfield during the summer on the back of his heroics at Roma last season.
Liverpool star Alisson is the highest-ranked goalkeeper in this year's Goal 50.
The Brazil international joined the Reds during the summer for £56 million (€62.5m) – which, at the time, was a record for a goalkeeper – and the 26-year-old has enjoyed an impressive start to his career at Anfield.
However, Alisson makes Goal's annual list of the world's best players because of his exploits with Roma last season, as well as his performances for his country at the 2018 World Cup.
Indeed, after being forced to play second fiddle to Wojciech Szczesny during his first season at the Stadio Olimpico, Alisson enjoyed a stellar 2017-18 campaign in the Italian capital, turning in a string of sensational displays as the Giallorossi surprisingly reached the semi-finals of the Champions League.
The South American didn't concede a single goal at home in Europe until the 4-2 second-leg victory over Liverpool in the semi-finals, while he was widely credited for keeping Roma in their last-16 tie with Shakhtar Donetsk after making a succession of acrobatic stops in Kharkiv.
Alisson also racked up 17 clean sheets in Serie A as Eusebio Di Francesco's side qualified for this season's Champions League with a third-placed finish before helping Brazil reach the quarter-finals of the World Cup in Russia, with the former Internacional No.1 going 323 minutes without conceding a goal along the way.
His fine form earned him a money-spinning summer switch to Merseyside, while he has now been recognised as the outstanding goalkeeper of 2018.