Mayweather and McGregor training videos from today side by side. 😂 pic.twitter.com/cAJDPy9Dwn
— BlackSportsOnline (@BSO) June 29, 2017
The paid will hold various conferences to promote the bout with Mayweather, 40, coming out of retirement for the fight.
Few are expecting the UFC lightweight champion to trouble Mayweather despite his punching power and he has been installed as a 5-1 underdog by bookmakers.
He trained at a gym in his native Dublin as a youngster but has never previously boxed as an amateur or professional, while former multi-weight world champion Mayweather compiled a 49-0 record before retiring two years ago.