By FOX Sports staff
Ronaldo did not celebrate his goal in Real's 1-1 draw against United at the Bernabeu in the first leg of their last-16 clash with the current Barclays Premier League leaders.
The two teams meet again on Tuesday, this time at Old Trafford and the Portuguese captain admits the high emotion of scoring in a place which he has had so many fond memories might be too much to control.
"It would be a beautiful sensation. If I score against them, it would be spectacular," he told The Sun.
"I can't say how I'd celebrate - it would be something spontaneous - but I'd love to be in that situation."
He added: "I'm sure they [the United supporters] will receive me well."
"After the years I spent there and the friendships I have, I'm sure it's one of the places where they'll applaud me most. It was a beautiful time."
Ronaldo spent six years at United, helping them win the Premier League three times and the Champions League once in his time there before leaving for Spain in 2009.
Meanwhile, England legend Alan Shearer has made the case for Wayne Rooney in the same newspaper. Shearer argues that Rooney's versatility contributes just as much to any team as Ronaldo does by scoring goals.
"While Ronaldo was allowed to roam free, Rooney was given a specific role," he wrote in his column for the UK-based tabloid.
"He has long since stopped being the man on the shoulder of the last defender, the fulcrum of all striking options. Rooney's versatility means he is here, there and everywhere, depending on the opposition and situation.
"So while Ronaldo was causing menace in the box, Rooney was operating in a right-midfield role, often dropping deep and trying to help his defence to counter the effectiveness of Real going forward.
"It was a role he also played to great effect in the 2008 semi-final of the Champions League against Barcelona, when his side got a crucial goalless draw in the Nou Camp - a night Ronaldo missed a penalty by the way.
"Indeed, in the last two seasons of Ronaldo's career at Old Trafford, it was Rooney who was willing to make way for a player who was emerging as one of the greatest attacking forces.
"Rooney was happy to go wide, deep, off the frontman, act as a wing-back... whatever the manager wanted. After the game in Madrid, one article said Rooney had now simply turned into a workhorse. But what manager would not want a player with that versatility?"
He finished by saying: "Ronaldo will shine on his return, I have no doubt. Rooney may be in his shadow again, but his role will be equally as crucial - and that should not be forgotten."
Ronaldo has 45 Champions League goals to his name in total while Rooney has 27 strikes - all with United.