Hughes said it would be odd not to shake hands with Sir Alex Ferguson today.
He said: "I had a fantastic career there and I was very fortunate that Sir Alex picked me more times than he didn't. I will always be grateful for that.
"I enjoyed every minute of being a United player, but when I beat him as a manager, which didn't happen often, I enjoyed every minute of that too.
"It is all about challenging yourself and going up against the top teams."
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