"We are right now not showing this quality or effort, we must wake up and when we lose the game we must know how we lost it; we can not sell our skin so cheap".
"We have heard and read the speculation and talk about what kind of reception Shaq would receive and although we have no idea what would happen, we want to go there and be focused 100 per cent on football and not have to think about anything else, that's all, " Klopp said.
"We have to start again, and the other teams don't get worse".
Red Star were thrashed 4-0 when they visited Anfield a fortnight ago, but stunned last season's finalists when they raced into a comfortable first-half lead courtesy of a Milan Pavkov double.
"We had the first big chance with Daniel, a very big one".
Visibly disappointed after what could prove to be a costly setback, Liverpool manager Juergen Klopp conceded his side played well below par in a cracking atmosphere.
I'm not exactly sure which it was - let me say Roma at home until they started scoring their goals. The football is good, a lot of things are really good, they caused City problems in the Carabao Cup.
Moments later Red Star and their 55,000 fans packed into the Rajko Mitic stadium were in dreamland as Pavkov picked up possession midway inside the Liverpool half, strode forward and unleashed a powerful strike into Alisson Becker's top right-hand corner.
His tactics and choice of players have been spot on thus far, but in faraway Belgrade, he made some questionable decisions which cost Liverpool victory in the match.
The hosts seemed fired up by it - winger Marko Marin was shown a yellow card for protesting in the fifth minute.
Rotation will be important for the Reds this season and Lovren has impressed in the few games he had played so far this season.
Reigning Turkish Super Lig champions Galatasaray have been linked with a move for Liverpool ace Xherdan Shaqiri earlier this week.
Klopp's side were beaten 2-0 by Red Star in Serbia in what was their second away defeat in Group C.
Milan Pavkov scored both goals as the Group C's basement club picked up their first win of the competition to give themselves hope of continuing in Europe.
'He has qualities like Joe [Gomez] has, like Dejan [Lovren] has, like Joel [Matip] has, so that is really good for us.
"We need to immediately improve in a way to win the game".
"They had too many set-pieces that's true and with one of them they scored".