Reports suggest that Liverpool are set to sign free agent and former West Ham goalkeeper Adrian as a replacement for former goalie Simon Mignolet. Simon Mignolet left Anfield on Sunday and completed a move to Belgian side Club Brugge in a deal worth £6.4m. READ: Dele Alli ruled out of Spurs PL opener against Aston Villa His departure means that Liverpool are short of decent cover for first-choice shot-stopper Alisson. They currently have an unproven 20-year-old Caoimhin Kelleher as an alternative in the reserve side. It can be recalled that West Ham released Adrain this summer. He made 150 appearances for the East London club.