Anthony Joshua appeared irritated by a reporter when asked about Floyd Mayweather Jr at Saturday’s fight between Laurence Okolie and Isaac Chamberlain. The WBA and IBF world heavyweight champion was co-promoting the bout at London’s O2 arena alongside Matchroom promoter Eddie Hearn, and he was asked about Mayweather Jr’s recent antics when at the venue. The now retired American boxer has recently posted videos of himself stepping barefoot inside an Octagon – hinting at a possible MMA rematch with Conor McGregor – but Joshua made it clear he is focusing on his upcoming fight with Joseph Parker on March 31. MORE: BOXING Michael Bisping makes brutal Mayweather v McGregor MMA fight prediction Lawrence Okolie cruises by Isaac Chamberlain as grudge match fails to spark Eddie Hearn defends Lawrence Okolie’s performance vs Isaac Chamberlain ‘I don’t really care about none of that sh*t,’ Joshua told Fight Hype. ‘I’m not interested in all that sh*t. I want to focus on my own sh*t. Do you know what I mean?’ Joshua’s next opponent is New Zealander Parker. (Getty) Joshua has knocked out all 20 of his previous opponents during his professional career with his most recent victory coming over Carlos Takam at the Principality Stadium on October 28. McGregor himself was last seen in action during his boxing fight against Mayweather back in August, a bout Joshua correctly predicted the outcome for as he backed the American before the first bell. The Brit has also met Mayweather before, previously telling him in May 2017 that he wanted to be on the undercard for his fight with McGregor.