FC Copenhagen coach Jacob Neestrup has warned Manchester United players of the atmosphere of Parken stadium.
Neestrup says it will be "100" levels up on what players experience at Old Trafford ahead of their Champions League encounter.
He said, "For me, it's not about hope. For me, it's about strong belief that we can get a result.
"I think the game over 95 minutes [at Old Trafford] was totally equal and I expect the same tomorrow.
"What can they expect? When I stepped into Old Trafford then I felt the historical atmosphere," he added.
"But you can't compare Old Trafford with Parken because the intensity is times 100 in terms of what we played in two weeks ago.
"Then this is a standard (that), for me, is way above Premier League, to be honest."