Alan Pardew's team is still littered with talented players who have the potential to upset United at Old Trafford on Boxing Day, as Welbeck knows.
The Reds striker told United Review: "They've found it a bit tougher this year but I know they've had some injuries, which have played a part.
"You can still see potential throughout their team. They have some real attacking threats - everyone knows about players like Demba Ba and Papiss Cissé.
"All I can do is watch their games, look for any weaknesses and then do some damage on the pitch if I get the chance."