Robin van Persie gave the reigning champions a 45th-minute lead from the spot after Ashley Young controversially won a penalty, resulting in a red card for Kagisho Dikgacoi, before Rooney sealed maximum points.
Here is a selection of our favourite Twitter reaction from the professionals, past and present, in chronological order to United’s first home win of the season.
England legend Gary Lineker (@GaryLineker) isn’t impressed by Young’s antics – but is by Van Persie’s finish: “The amount of times Ashley Young throws himself to the ground, he should think about getting a Rooney headband! A Robin Van Penalty gives United the lead.”
United legend Gary Neville (GNev2) asks the question on the lips of most supporters: “Was it in the box?”
Ex-Birmingham City midfielder Robbie Savage (@RobbieSavage8) has his say: “You heard it hear first, never a penalty!”
Celebrity Arsenal fan Piers Morgan (@piersmorgan) is revelling in his side’s superb deadline day signing: “Would like Fellaini at Arsenal – but let’s be honest, he’s no Ozil. #Afc”
Former Liverpool midfielder Dietmar Hamann (@DietmarHamann) is happy to see Moyes place his faith in the kids: “Good to see Moyes giving Januzaj half an hour when the game is still in the balance.The kid looks very promising. Well taken free kick by Rooney.Looks as lively and hungry as ever.Will have a big season I think.”
Retired Bolton midfielder Fabrice Muamba (@fmuamba) likes the look of Adnan Januzaj: “Januzaj, what a player.”
Everton legend Tim Cahill (@Tim_Cahill) congratulates his old team-mates: “Good win captain @fizzer18 and congratulations to @fellainiM for his debut. Looking forward to seeing Everton vs Chelsea later #EFC”
Fellaini (@fellainiM) responds: “@Tim_Cahill @fizzer18 thank you Bro.”
Meanwhile, United coach Phil Neville (@fizzer18) can put his feet up after helping the Red Devils win – albeit from the sidelines: “Good win – good performance – home for a Chinese and watch the footie results come in!!”
Ex-United defender Paul McGrath (@Paulmcgrath5) praises his old club: “Well done Man United. No easy games this year, good there. Now some of the same we’re at home villa this is it :-) then Everton v Chelsea.”
Finally, Palace striker Cameron Jerome (@camjerome33) gives his thoughts on the loss: “Disappointing result today but take the positives from a good team performance great support from our away fans #ontonextweek #cpfc”