Frank Warren has branded Eddie Hearn a "kid" as the pair's row over Tyson Fury's clash with Dillian Whyte continues.
Fury will defend his belt against Whyte on April 23 after Warren trumped Hearn's purse bid with a £31million offer to stage the clash.
A furious row has continued between the promoters with Hearn now claiming Fury could have issues with gaining a boxing licence in the UK.