Ronaldo, 33, has started life in Serie A with 11 goals and six assists in his first 16 outings and looks set to play a starring role once again when they face the Giallorossi tomorrow.
However, the Portugal captain has revealed that Roma players "threatened" him during his time with Manchester United - during their famous 7-1 drubbing of the Italian side in the UEFA Champions League back in 2007.
Ronaldo bagged a brace in that quarter-final second leg at Old Trafford and ahead of the crucial clash, he said that back in 2007, when United were 6-0 up, Roma players resorted to bizarre tactics to end the rout.
"When it was 6-0, they asked me to stop, an opponent begged me to stop dribbling," he said, as per The Express.
"Others threatened to hurt me. Roma? There is no player with whom I would exchange a shirt."