The Bavarian giants head to Old Trafford to take on the Red Devils in the quarter-final first leg tomorrow night and despite their mediocre domestic form this campaign, United will surely be a tough opponent according to Neuer.
"The name Manchester United deserves a lot of respect alone. They fought back well against Olympiakos (in the Round of 16)," he told reporters.
"We know just how well they can maintain their focus.
"If you look at the history of Manchester United, they are always a big side so there is no time for underestimating them."
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