Heavyweight boxer David Haye has claimed that singing star Justin Bieber is much harder than he looks, and that during a recent fight between them in the ring, he punched a lot harder than people think he would.
According to the Daily Star, Bieber didn't fight back when hit by Zach Galifianakis, 43, as they filmed for Funny Or Die.
Haye sparred with Bieber back in 2011 after inviting him to him gym in Vauxhall.
By making this revelation, the boxer has issued a warning to the pop idol's enemies, suggesting that he has a hook to be reckoned with.
