The Argentina midfielder started all five of Liverpool's fixtures during the month as they clinched the Premier League title.
Mac Allister scored two terrific goals – long-range strikes against Fulham and Tottenham Hotspur – and also set up Virgil van Dijk's late winner versus West Ham United.
He appears on the shortlist for the award alongside Rayan Ait-Nouri, Harvey Barnes, Jacob Murphy, Morgan Rogers, Ryan Sessegnon and Jorgen Strand Larsen.
Vote for Mac Allister to win here.
