Conor McGregor sent a vicious series of messages to Bellator middleweight champion Gegard Mousasi after he spoke out about his boxing fight with Floyd Mayweather.
The Irish star fought in a crossover bout with retired star Mayweather in 2017 in a fight which is the second-biggest selling in combat sports history with around four million pay-per-views sold.
He was ultimately defeated but generated up to $100million from the clash.
