Mignolet will be under pressure for his place in the Liverpool side in the coming weeks with Loris Karius returning to fitness.
After an eventful window for Liverpool and manager Jurgen Klopp, we take a closer look at each of the club's new signings.
Mignolet will start the season in goal for the Reds, but he is not guaranteed to be number one for the entire campaign.
Gareth Barry is set to join Ryan Giggs, Rio Ferdinand and Frank Lampard in having spent 20 seasons in the Premier League.
Alex Manninger started for Liverpool against Roma last night.
Mignolet has a fight on his hands to be Liverpool's first choice 'keeper following the signing of Loris Karius.
A round-up of the transfer news involving Liverpool Football Club this Friday.
The experienced stopper joins on a short term deal from FC Augsburg.
The former Arsenal goalkeeper has signed a short term contract with Liverpool after his Augsburg release.
Manninger has signed a short-term contract with the Reds.