By TMZ Sports
There's a fight of the century over the fight of the century ... with two major sporting events vying for the T-Mobile Arena in Las Vegas on August 26th.
In one corner ... the Floyd Mayweather Jr. vs. Conor McGregor showdown on Showtime Pay-Per-View. When the fight was officially announced on Wednesday, UFC President Dana White and Mayweather Promotions CEO Leonard Ellerbe stated it will take place at the Vegas venue.
The problem is ... Ice Cube's BIG3 basketball league already booked the location for the league championship game on the same night.
Our BIG3 sources tell us they have no plans to move -- they still have the venue booked and expect to play there on August 26th. The league even tweeted about it on Friday evening and T-Mobile has game tickets for sale on its site.
Sources connected to Mayweather vs. McGregor event tell us there are plans in motion to move BIG3 to the nearby MGM Grand Garden Arena [who own T-Mobile] ... and they say it's just a matter of time before that becomes official.
When Mayweather's promotional company first reserved the date, they reserved it at the MGM Grand, but then switched it over to T-Mobile.
For now, both sides have dug in ... it's a standoff.
