It's every Tom Brady fan's worst nightmare ... seeing their superstar take a shot to the face. But it was all in good fun as the Pats QB attended a Muhammad Ali charity event Tuesday night.
Brady served as an auctioneer at the TAG Heuer event at Gleason's Gym in Brooklyn ... posing with guests like Evander Holyfield, Henrik Lundqvist and even takin' a punch from fashion designer Iris Apfel.
A unique gold Ali-inspired watch was auctioned off with a pair of autographed boxing gloves and a commemorative medal. No word on how much it went for, but it couldn't have been cheap.