Unfortunately for the 22-year old he had to be replaced after picking up a slight injury but he has earned praise from reserve team coach Ole Gunnar Solskjaer.
"Diouf is a young lad and he will get his chances but he is one that we have brought in for the future," Solskjaer told Telegraph Sport.
"He is a different kind of player to what we have up front. Of course, when you sign players you hope that they are going to establish themselves as first team players.
"He has fantastic potential. He is a fantastic athlete and he has a fantastic attitude plus he is a good finisher as you saw here tonight so we are very pleased for far with the start that he has made."
"I don't think I need to give him any advice because I have already got to know him a bit. I have seen him in Norway and I have spoken to him a bit and he is very down to earth and he knows what he wants."
During Man United’s 4-0 victory over Sunderland’s reserves, Federico Macheda made his comeback from injury and Ben Foster kept a clean sheet in goal.
"It is very pleasing that he [Macheda] has come back," Solskjaer said. "He has been out for a very long time which has been difficult for him and now is the time for him to kick on and keep working hard.
"He got 20 minutes under his belt and I know it is only reserve team football but that is important to him."
"Ben made three magnificent saves - two in the second half, one in the first. He has always been a good shot-stopper but he is maturing all the time in his overall play. His understanding of when to quicken it up and his cross-taking- everything has improved a lot."
