Mayer and Cameron separated by security at weigh-in ahead of light-middleweight unification bout

Mikaela Mayer and Chantelle Cameron butted heads at their Friday weigh-in at Birmingham's BP Pulse Arena, exchanging words before security intervened. The clash sets a fiery tone for Saturday's fight, in which Mayer's WBA and WBC light-middleweight belts meet Cameron's WBO strap — three titles in one ring, live on Sky Sports.