"It's not impossible to leave him out," Solskjaer said. "He is 36. Mason [Greenwood] is 19 so it's the same, I have to manage his minutes and I have to manage a 36-year-old's minutes as well.
"The other thing with Cristiano is that he looks after himself so much so I know he will recover quickly. Of course, it's important that we get everyone up and running and to get him up and running."
Jesse Lingard put himself in contention for a start against Young Boys after coming off the bench to score the fourth against Newcastle.
"Jesse has had his hard times and he is a lovely boy, or man now," he added.
"He was allowed to go out [on loan]. I could have kept him because I know how good a player he is but he showed everyone with West Ham and England what kind of player he is.
"He is a Man United fan. He has grown up with the Man United kit on himself since he was a baby so I am so pleased for him and he is a top top player and person."