Gervonta Davis vs. Leo Santa Cruz -- one of the biggest boxing matches of the year -- has officially been moved to October 31st ... and we're told it's all because they want fans in attendance.
The fight was originally set for Oct. 24th -- but we're told Gervonta's promoter Floyd Mayweather "wanted to ensure he would be able to fight in front of fans."
So, the fight was moved to the Alamodome in San Antonio -- where state guidelines allow the venue to hold 50% capacity.
The site can hold 32,000 people for boxing matches -- so promoters are expecting 16,000 fans (hooray math!