Maybe, just maybe.

Our Mayweather sources tell us the 50-0 fighter is aware De La Hoya called him out ... and Floyd's actually open to a fight with Oscar, IF he really has $100 million.

But, we're told, people in Floyd's camp highly doubt he has the dough.

Remember, we saw De La Hoya leaving dinner with his GF Holly Sonders in L.A. ... and when we asked him about his fighting future, ODLH said he wanted Mayweather.

"You know who I'm gonna call out for my next fight? Floyd Mayweather."

And, that's when the Golden Boy threw out a huge money proposal ... "I'll offer Floyd Mayweather $100 million."

Of course, Oscar and Floyd last boxed at the MGM Grand in Las Vegas in 2007 ... where Mayweather won a 12-round, split decision.

Mayweather retired in 2017 following his fight with Conor McGregor ... but has been fairly active, taking several exhibition fights since -- including a bout this summer against Logan Paul.

Oscar hasn't fought since 2008 ... when he lost to Manny Pacquiao.

De la Hoya was scheduled to fight MMA legend Vitor Belfort ... but unfortunately came down with a serious case of COVID, forcing him into the hospital.

But, Oscar made it crystal clear ... he wants to fight this year, and he wants it to be against Mayweather.

Bottom line, if the bag's real, and it's big enough, Floyd will listen.