By  Rick Reeno

Stephen Espinoza, Executive Vice President and General Manager of Showtime Sports, indicates that Floyd Mayweather Jr. (48-0, 26KOs) is very close to making an official announcement regarding his next fight, which is scheduled to take place on September 12th at the MGM Grand in Las Vegas.

Last week, TMZ jumped the gun by announcing that a fight between Mayweather and Andre Berto was officially agreed upon. Make no mistake, Berto is the frontrunner but there are still a few loose ends that need to get tied.

"Nothing has been finalized yet. As soon as everything is finalized, an announcement will come immediately. There are a lot of details that have to be finalized and there are a lot of people working to get [Mayweather's next fight] done as soon as possible," Espinoza said.

The biggest question for Mayweather's next fight - is the outlet. Initially, the idea of placing Mayweather's next fight on network television, on CBS, was being discussed. It would have stamped Mayweather's first bout outside of a pay-per-view platform in a decade.

The biggest issue with making a Mayweather fight or any major fight on network television, is planning it way in advance. The advertising slots on network television are usually sold several months in advance of a certain quarter or time period. That complicates things in terms of selling the advertising for Mayweather's fight.

Mayweather was last seen in action on May 2nd, winning a decision over Manny Pacquiao, and even during this time period CBS could have already sold a decent chunk of ad slots for the second Saturday of September.  

"Network television operates under a different timetable, particular in terms of selling ads. From network TV....we're talking six, eight, ten months in advance - and not six, eight or ten weeks in advance [like a pay-per-view event]. In some ways selling ads to a one-off event, even if its the biggest one-off event that boxing has to offer, is a challenge for network television," Espinoza said.

Mayweather has yet to make an official decision regarding the platform to carry his next fight - network television or pay-per-view.

Espinoza was unable to confirm which direction Mayweather was leaning, but a source with knowledge of the negotiations advised BoxingScene that Mayweather's fight was "98%" locked in as a pay-per-view event. 

"Part of what's been going on is that Floyd is evaluating each option and I expect an answer from him pretty quickly," Espinoza said