Well, it’s finally been confirmed - Floyd Mayweather and Conor McGregor will have a boxing match.
The much talked about super-fight will take place in Las Vegas on August 26 and puts an end to speculation surrounding a possible match between the retired boxer and the MMA fighter.
But the sporting crossover is not the first of its type despite some claiming it will be a unique event.
In 1976, the great Muhammad Ali fought a Japanese wrestler named Antonio Inoki in Tokyo.
Far from enjoying a smooth money-spinning encounter, Ali was kicked so hard that he developed blood clots in his legs.
Some say Ali was never the same again, but it was certainly entertaining to watch.