"I don't want to cry about it, but sometimes I think yes. It's a question to which I never give the 100% right answer, because sometimes I really don't know," Ronaldo told CNN.
"I don't think it's allowed for people to change my personality. Maybe sometimes, I agree that I have a bad image on the pitch because I'm too serious," he added.
According to the report, it comes after Ronaldo and Messi will go head-to-head for the prestigious Ballon d'Or in January, with the Barcelona star having won the award on each of the previous three occasions.
Both men have taken the sport to a new level with their record goalscoring feats: Ronaldo has scored an astonishing 164 times in 160 appearances for the Spanish champions, while Messi hit 50 in La Liga  alone last term, the report said. (ANI )