The defending Premier League champions will host their Bundesliga counterparts in the first leg at Old Trafford on Tuesday.
"We will study them and try to exploit any weaknesses they do have," The Mirror quotes the 22-year-old as saying.
"We're realistic and know how difficult the game will be. We know how well they're playing, they're in form and have won the league.
"Who knows? It's the Champions League, it's a home tie at Old Trafford and if we get the crowd behind us, then you just never know."
The second leg will be played at the Allianz Arena in Munich next week.