Floyd Mayweather and Conor McGregor both say a crossover showdown is likely to happen.
Mayweather signed off his professional career with a points win over Andre Berto in September 2015 to take his record to a perfect 49-0.
But the former five-weight world champion, who turns 40 next month, has in recent months been linked with a so-called 'super fight' in a crossover encounter against McGregor.
The Irishman insists his next fight will be in a boxing ring and called out Mayweather, branding him 'scared'.
'I am enjoying the little games we're playing the back and forth. Let's give the fans what they want,' said McGregor.