United will face Chelsea on Sunday.
Rooney said: “It has been frustrating being out and it would be great to make up for it on Sunday.
“I was delighted to be back against Sporting. Now I’m as close to fully-fit as possible for Sunday’s game.
“It may not be a title decider so early on but it’s a massive game.
“It could be a good time to play them. They’re missing Lampard and Drogba, two very big players for them.”
