The goalkeeper was signed from Roma for £66.8million last summer.
He has since gone on to feature in all 34 Premier League games the club have played so far this season.
The 26-year-old also has the most amount of clean sheets with 18, two ahead of nearest rival Ederson.
The Brazilian has been a key part of the Premier League’s best defence with just 20 goals conceded all season.
Liverpool currently top the league by two points ahead of Manchester City, who have played one game fewer.
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The Reds also made it through to the semi-final of the Champions League with a 6-1 aggregate win over Porto.
Alisson has not been their official number one, though.
He took the vacant 13 shirt number when he joined the club at the start of the season.