Last updated on .From the section Rangers
The club's heaviest ever European defeat came after a second-half collapse against the Reds.
In the second half, the side scored six without reply, including a six-minute hat-trick from Mo Salah.
Rangers have scored one goal in the section and have conceded 16.
We need to change our mentality.
Our levels drop very quickly when we are not mentally strong. We need to avoid that in the future.
If we want to be a success this season, we need to improve.
The Rangers manager said the 7-1 defeat was very hard to explain after a rousing first-half when his side took the lead through Scott Arfield.
Last season's finalist added four in the final 20 minutes after Firmino and Nunez made it a three-point game.
We were not in the game in the last 25 minutes. We didn't do it with our heads. You are punished against a team likeLiverpool.
The first half was daytime and the last half was nighttime. The way we played the last 25 minutes will cost you the game. At the moment, I don't know what to say.
We don't want to represent this club in a way like that. There is no excuse for us. We have to process that and get ready for Sunday.
Rangers' misery was compounded by the injuries toConnor Goldson andRyan Jack.
Both players are not good when Rangers visit Motherwell on Sunday.
The manager said that they needed to wait and see what the injury was. We have to determine how long it will be.