Milan Pavkov's first half double was enough for the hosts to secure a memorable victory over the Reds.
"The fact they were on the bench and came on half time suggests they were fine so it wasn't them carrying something.
"I think the message it sends to the rest of the players was, 'You won 4-0 last time we'll be fine again tonight.'
"I'm of the belief you start with your strongest team, get the game won and then get off the players you want to rest.
"I think that message by not picking your strongest team to start with would have an effect with some of the players who did start.
"They weren't at it. They didn't start right and when you don't start right, it really is an uphill battle to get the momentum back again.
"I felt they handed the momentum to Red Star and they managed to keep it for the rest of the game.
"They're not at the level they were at last year, Liverpool."