Moyes told reporters after the game: "We played well and scored some really good goals. I'm really pleased with the performance. Juan Mata got us a couple of goals and was involved in the final one for Adnan Januzaj as well. Mata was terrific and so were Shinji Kagawa and Darren Fletcher. We had some great performances today.
"I always believed I had options and a squad of players who could come in and play. I've said all season that we have a really good squad of players and we showed that today. They played well and deserved the victory.
"The focus could only be on this game but you could see we've left a few players at home and not played a few players. We are hoping they will be fit for Wednesday night's game at Bayern Munich."
United's victory, their fourth in a row on the road, puts them sixth in the Premier League table.