Nothing Formal, Nothing
No one says that, with Karina Ferro, Cristiano Ronaldo had something formal, but there are many who say that both were involved. Karina Ferro is a beautiful Portuguese model who met Cristiano when he was quite anonymous.
Apparently, the short-lived relationship between the two would have happened in 2002. Although Karina says she was with Cristiano for two years while he played for Sporting, apparently it was nothing formal or serious, so they broke up and went back and forth frequently.