"It is the Champions League and we will try to win every match," he said. "I never have a negative approach going into a match, I did not have that against [Borussia] Dortmund either.
"To be honest, it is always a 50/50 chance and form on that day that decides which team win. We will strive for a win on Wednesday."
In the other Group B fixture on Wednesday, Montpellier will host Olympikcos in France.