"I, Claressa Shields, will whoop Jake Paul's ass! He can come in the ring weighing 180 pounds and I will come weighing 168 and I will beat the s**t out of him!"
Yup, that's one of the greatest female boxers ever ... telling TMZ Sports she's ready to humble the YouTube superstar and show him what it's like to go up against a REAL fighter!!
We spoke with the champ about the recent Paul and Nate Robinson fight ... and she says they made a "mockery" of the sport because there are actual boxers who should have gotten the chance to fight under a Tyson and Jones Jr.