Claressa Shields still has Amanda Nunes squarely in her sights, and has taken steps to make the fight a reality ... telling TMZ Sports she's met with an MMA coach and her manager talked to Dana White.
Shields -- who's only 24 years old -- is a beast. She holds belts in 2 weight classes, and is looking to make history as the fastest fighter to be a champion in 3 different divisions.
Vasyl Lomachenko accomplished the feat in only 12 fights .