Former Cameroon international Eric Djemba-Djemba, who made his Red Devils debut in the same match Ronaldo did, has now revealed that he enjoyed a close relationship with the Portuguese superstar.
Speaking to American Gambler recently, Djemba-Djemba shared some insight into what it was like training and playing alongside Ronaldo.
Click through the mini-gallery above to see some images of Ronaldo throughout his career!
"People can watch Ronaldo on the television, but they don't know the real Cristiano," the Cameroonian said.
"Cristiano is a man, who had a difficult time as a kid in football. People see him on the television and think he is arrogant or takes the [expletive] out of people, but Cristiano is an emotional man.
"You need to talk to him to see who he really is. My mum passed away and he said, 'Eric, if you need me, you can call me, you can visit me, don't worry, I am here for you'.
"Every day, when we were together at United, we drove to training together... After training we went to eat at Nandos in Manchester; he helped me discover Nandos!
"When we went to away games, we were roommates. He was my best friend. We were together every single day for training."
Djemba-Djemba made 20 league appearances for the Red Devils between 2003 and 2005, before going on to play in Qatar, Denmark, Israel, Serbia, Scotland, India, and Indonesia.
Has Djemba-Djemba's stories about Ronaldo changed your view of the Juve star? Let us have your thoughts by commenting below.