Ronaldo burst onto the scene at Old Trafford in 2003 after being signed from Sporting Lisbon.
A scintillating performance as a substitute on his debut against Bolton gave the footballing world its first true glimpse at a player who would go onto become one of the best in the world.
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And Giggs, who played and scored in that 4-0 win, recalls how he never envisioned the superstar Ronaldo would become.
“You could never see him being one of the greatest goal scorers ever, you just couldn’t,” Giggs told beIN Sports.
“In his first game against Bolton he delighted the crowd and then it was a little bit of a dip really, a little bit of frustration.