Liverpool will be without Xherdan Shaqiri for their Champions League trip to Belgrade on Tuesday evening, with the Swiss global being left at home for safety reasons following his Albanian eagle celebration against Serbia at the World Cup.
Liverpool thrashed Red Star Belgrade 4-0 last month and top Group C by a point heading into the clash.
"Then more or less straight away they score the second one and then the atmosphere was completely different, you could feel it".
'We didn't start well enough, ' Milner said.
"We have to cool the situation down because [we] can not clarify that situation tonight - and it's not our job".
Liverpool were held in their last Premier League game and dropped to third in the league table, so they will look to get back to winning ways.
"They're struggling away from home and PSG are playing really well at home", McManaman said of Liverpool.
Liverpool also chose to start with first-choice striker Roberto Firmino on the bench.
Red Star are expected to be without Vujadin Savic due to injury but Marko Marin is set to return to the squad.
"It's a situation where we will go to the fantastic city of Belgrade as a football team to play football, Klopp told Liverpool's website".
They have, however, conceded the most goals (10), faced the most shots (75) and most shots on target (36) of any team in the Champions League this season.
The 27-year-old is an ethnic Albanian from Kosovo, where tensions between the Albanian and Serbian populations have remained rife since the Kosovo War of the late 1990s.
Xherdan Shaqiri has been left out of Liverpool's squad for their upcoming fixture against Serbian club Red Star Belgrade because of his Albanian roots.
Left-back Andy Robertson, playing nearly as an out-and-out winger after the break, saw a cross deflected on to the top of the crossbar, while Salah finally forced a save out of Milan Borjan, hitting a post with his next effort.
"Maybe if Shaq would have played they (the crowd) go for him or whatever, I don't know, but I didn't think that far", Klopp added.