Messi made his debut long before he was 18. He was the standout player for the youth teams of Barcelona, and everyone took notice of his skill. Though his debut with the first team was a magnificent milestone, nothing compares with what he learned from  Ronaldinho  in the early stages of his career. Messi can thank his former Brazilian mentor for helping him become the player he is today. Many are hoping Messi will be the same mentor for Neymar; it is only fitting. MESSI PHOTO Messi and his son