"We the staff try to prepare the players to win. But there are people around who are saying, 'How many goals are you going to score against Anderlecht etc?' so maybe subconsciously they think that all they need to do is step on the pitch to win the game," said Blanc, according to The National.
"We can't do anything if people say that we are playing brilliantly. In my pre-match press conference I said that this was our most important match in the group and everyone had a smile on their face, but it was the truth.
"You (journalists) do your job and you do it quite well because you give out praise when a team is playing well. But we need to be wary of that because you win games on the pitch, not before the match has started."
PSG find themselves at the top of Group C with four games played.