Giggs studied for his coaching badges while working as assistant to Van Gaal
"At the beginning you didn't see it but it was something that Giggsy grew into," he told The Sun.
"You can see that he loves the game and is a student of the game by taking all of his coaching badges.
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Giggs and Rio Ferdinand were United team-mates for 12 years
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"He grew into where he is now. Towards the end of my time there you could see it more. So it's a natural progression.
"Ryan was in and around the coaching staff, especially when David Moyes was there.
"And once you are doing your badges, you see the game a different way."