The Red Devils face the reigning European champions on Tuesday night as they look to build on the 4-1 win over Aston Villa on Saturday.
Moyes admits that it has been a "difficult season" for the club and insists that a win on Tuesday could be vital to his side's form from here on in.
"It's been a difficult season for us but we can go a long way to doing an awful lot better if we can get a result on Tuesday," Moyes told reporters.
"The players are incredibly focused and I am really looking forward to the game."
United currently sit in seventh place in the Premier League table.