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Chris Webber has some sound advice for all the young athletes suiting up for the Final Four ... telling TMZ Sports one mistake -- like, say, calling a timeout when your team doesn't have one -- won't ruin their lives!!
We ran into the former NBA star and Michigan Wolverine before Houston, Duke, Florida and Auburn take the court during the NCAA tournament's semifinals this weekend ... and he reflected on his own career before dishing out some words of wisdom.
"I wouldn't trade one moment that I had at the Final Four," Webber said.