Mayer and Cameron split by security after clash at weigh-in

Mikaela Mayer and Chantelle Cameron had to be split by security as an amicable build-up erupted into a surprise war of words at Friday's fiery final weigh-in.

The two rivals locked foreheads in the middle of the stage before a fired-up Cameron vowed to "smash her head in" ahead of Saturday's blockbuster super-welterweight world title fight in Birmingham.