The first-leg fixture at the Emirates Stadium in February resulted in a 3-1 success for Jupp Heynckes' men, and the Germany international is certain focus will be key going into the second leg on Wednesday.
"I don't have any worries that we might take the match too lightly," the 23-year-old Muller told reporters at the pre-match press conference. "We will step on the gas. Even if something will go wrong in the match, we should be able to pick ourselves up."
Muller scored and assisted on a goal in the 3-1 away victory that has the current Bundesliga leader in position to advance to the quarterfinals as long as it can take care of business at the Allianz Arena.