The Spanish side face United at the Mestall in a Champions League Group C game on Wednesday.
Emery said: “We have high expectations. We are looking forward to the match because we have the confidence that we can do well. We understand that Manchester United are a great rival, regardless of their results.
“We have great respect for them, but we do not fear them under any circumstances. It is a challenge for us, both in tomorrow’s game and in the Champions League in general.
“My team has shown that they are capable. The way to beat them is to negate the abilities of the opponent.”
