Andre Berto -- If Mayweather Wants to Fight ... Let's Fight!

Boxing stud Andre Berto tells TMZ Sports ... he was HONORED that Floyd Mayweather would name him as a possible opponent for an upcoming fight -- and says he's ready to KNOCK FLOYD OUT!!!

Earlier this week, Mayweather said he "needs" a guy like Berto for his next fight in September -- though so far, nothing is set in stone.

We spoke with Berto who tells us being named is a "blessing" -- and says, "We were supposed to fight a few years back. This may be the time. I am older. I am wiser. I am focused."

Berto -- a 2-time welterweight champ -- adds, "If the fight happens, you know it’ll be more exciting than the Pacquiao fight!"

In fact, Andre says if the two sides are able to work out a deal ... he's doesn't just want to win, he wants to OBLITERATE Floyd.