Mayweather officially retired from boxing earlier this year after winning the big-money bout against Conor McGregor.
He dispatched the UFC star in the 10th round with a TKO to finish his career at 50-0.
But there have been consistent rumours about a possible rematch between the pair.
Last month Mayweather shared numerous videos of him back in the gym prompting numerous reports that the 40-year-old could be tempted to make another return to the ring.
And he has tantalised fans yet again with another video on Instagram showcasing his incredible hand speed.
One avid fan posted: “Damn man who u fighting next aliens?”
While another pointed out a hint in the video that could determine Mayweather’s next move.
They said: “That’s called a snapping jab… He up to something looks like he sparred still got the cup on.”
Oscar De La Hoya last week called out McGregor for a fight while also aiming a thinly veiled dig at Mayweather by insisting he could take out the Irishman inside two rounds.
“I still have it in me. I’ve been secretly training, secretly training. I’m faster than ever and stronger than ever,” De La Hoya said.
“I know I can take out Conor McGregor in two rounds. I’ll come back for that fight. Two rounds. Just one more [fight].
“I’m calling him out. Two rounds, that’s all I need. That’s all I’m going to say. You heard it on Golden Boy Radio. Two rounds, that’s all I need.”