Floyd Mayweather 'tried to make the fight happen' against Conor McGregor

McGregor, 28, is under contract with the UFC.

Floyd Mayweather Jnr says he almost came out of retirement to fight UFC featherweight champion Conor McGregor.

Mayweather Jnr, 39, retired from boxing in September 2015 but was recently considering a bout with McGregor.