Floyd Mayweather isn't jumping right back into the ring with Manny Pacquiao ... instead, he's taking a tune-up fight in Tokyo, with the big money Pacman rematch to follow, according to TMZ Sports.
Mayweather called out Manny last weekend, telling Pacquiao and the world he wanted to run back the 2015 superfight in December.
Now, sources sources close to TBE tell TMZ he's actually eyeing 2 comeback fights ... starting with a massive boxing event in Tokyo.
Conor McGregor's name has not been mentioned.
There's no date set in stone just yet ... but word is New Year's Eve is the target.
If all goes according to Floyd's plan, the Pacquiao fight would then follow sometime in 2019.
52-0??