MANCHESTER United manager Ole Gunnar Solskjaer said he will carefully manage Cristiano Ronaldo's playing time but has to balance that with getting the 36-year-old Portugal forward settled into the side.

Ronaldo, who has rejoined United after 12 years away, marked his comeback at Old Trafford with two goals in Saturday's 4-1 Premier League win over Newcastle United.

United return to action in Tuesday's opening Champions League group stage match against Swiss club Young Boys and Solskjaer said he would not rule out resting Ronaldo.

"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