Mane is suspended for 3 games after picking up a red card against Manchester City.
Saunders claims Liverpool will not win trophies without strengthening their defence.
Liverpool settled for a point in their first Champions League fixture of the season at Anfield.
Liverpool have conceded seven goals in their last two matches in the PL and Champions League.
The Reds boss was heard shouting 'what have I done?' as a row broke out after the final whistle.
Mane will miss three domestic games for Liverpool after the sending off.
Belgian goalkeeper Mignolet has been the preferred choice in the Premier League.
Reds fell to a humiliating 5-0 defeat against City at the Etihad Stadium on 9 September.
Coutinho is yet to start a game for Liverpool this season.
Jurgen Klopp's side fell to a 5-0 defeat at the Etihad Stadium on 9 September.
Mane, 25, was sent off after a collision with Manchester City goalkeeper Ederson Moraes.
Ings has not played for the first-team since undergoing surgery last October.
Keita will become Liverpool's club-record signing when he joins next summer.
Liverpool are currently in second place while City are in fourth on the Premier League table.
The Reds are to leave Melwood for the new facilities five miles away in Kirby.
Reds boss insists relationship with Coutinho remains unaffected despite Barcelona interest.
Woodburn scored a stunner on his Wales debut in their 1-0 win over Austria.
Klopp admits Coutinho needs more fitness work before he returns to the pitch.
Coutinho missed Liverpool's first three games with a back injury.
Woodburn, 17, scored on his international debut for Wales against Austria last weekend.
Ilkay Gundogan has been out for almost 10 months with a cruciate ligament injury.
Origi says he is ready to play anywhere in the attack at Wolfsburg.