The defender is set to join the Reds from Schalke in the summer.
The Reds confirmed the capture of the Cameroon international this week, with the defender set to join on a free transfer from Schalke in the summer following months of speculation linking him with a move to Anfield.
He looks set to be one of several new faces to arrive in the summer, with many expecting Jurgen Klopp to make changes to the squad he inherited from Brendan Rodgers.
And speaking on the transfer, Hamann says that it is a coup for his former club.
“There’s hardly any risk, he’s a very sought after player in Germany. It’s a coup,” he told TalkSport.
“Jurgen Klopp himself said that Schalke didn’t want him to go. He’s only 24 and he’s played over 200 games in the Bundesliga.”
“I think he’s got the physicality to be a success in England and for Liverpool. They’ve had problems in defence in recent years so they had to bring someone in.”
Klopp will be hoping that Matip can seriously help his side improve defensively next season, with that area having been a considerable weak spot this year.
His side have conceded 36 goals in 26 games so far, the fifth worst record in the division and level with Chelsea, who are currently 12th in the table and five points off the Reds.
That has been a serious hindrance to their hopes of making the top six and beyond, and improving it will be of the utmost priority if they are aiming for the top four next season.