City travel to Russia having taken just one point from their opening two matches of the tournament, putting them at risk of not reaching the second round.
While CSKA have lost both of their games so far, Musa is confident that they can get off the mark against the English champions tomorrow night.
"As you can see, they are very weak this year. We are going to use that advantage against them," he is quoted as saying by Goal.com. "In a couple of games they haven't been that good. They are very weak in the defence so we are going to do our best to work against that.
"I think we are going to have a great opportunity because of the quality of the players we have. I think Tuesday is going to be a very good game for us. We are going to do our best to win because this is the last opportunity that we have."
Tomorrow's match at the Arena Khimki will be played behind closed doors due to sanctions placed on CSKA following a number of racist incidents involving their fans last season.