Manchester United Manager David Moyes has challenged striker Danny Welbeck to score 20 goals this season.

Welbeck came off the bench to score the winner in United's 1-0 win over Norwich City on Saturday, which was the England forward's fourth goal in five appearances.

United were without Wayne Rooney and Robin Van Persie for win against the Canaries, however Rooney is likely to return against Tottenham Hotspur on new years day to partner Welbeck upfront for the crucial encounter.

Moyes believes Welbeck can now push on for more goals in the absence of Van Persie. 

"We have said to him we are trying to keep his finishing up. I think he can keep his efforts up, his levels up even better," said Moyes.

"I think Danny has responded, he is saying 'hey this is quite good I am beginning to score some goals and getting recognised for that as well'.

"He got one goal last year and now he is on seven for this season. It could be better, but you have got to say it is going in the right direction.

"With the second half of the season to go, he should be certainly looking to score 20 goals. We need him to do that because when you don't have Wayne and you don't have Robin, then you need people to step up to the mark.

"In quite a few of the games recently he has done that for us."

Javier Hernandez started upfront for United on Saturday, and Moyes feels his side need to have plenty of options.

"I don't think at Manchester United you have only two players to do the jobs. You have got to have more, like in these games you would never be able to cope when you pick up injuries," the Scot added.

"I see it more as a squad rather than any one. Chichirato is part of that, who is a great goalscorer too."

Despite being unbeaten in their last five games, as well qualifying for the semi-final of the Capital One Cup and the last 16 of the Champions League, Moyes is keeping everyone grounded.

"That is my style," Moyes insisted. "We are just trying to move along and we have nothing to shout about here at the moment."