Manny Pacquiao Proves He's In Insane Shape For Spence Fight, Peep These Abs!

Don't let the age difference fool ya -- Manny Pacquiao tells TMZ Sports he's feeling great before going up against Errol Spence next month ... and he's showing us just how shredded he is!!!

Of course, 42-year-old "PacMan" is still one of the best boxers in the world ... and he's out to prove he's not slowing down anytime soon when he takes the ring against the 31-year-old champ on August 21.

We caught up with Pacquiao during a workout sesh in L.A. on Friday ... giving a large crowd a show by putting his quick hands on display and getting in a bit of stretching.

Pac even gave us some 1-on-1 time as well ... opening up on all his preparations for the big fight.

"I'm still good, I'm doing fine," Pacquiao tells us while sipping on his NXT LVL Hydrogen water. "Ready for a fight."

Naturally, with Pac being in his 40s and still crushing it, we had to ask who would retire first -- Pacquiao or his good friend Tom Brady ... and his answer is awesome!!!