Claressa Shields is getting a big-time assist in her possible MMA fight with Amanda Nunes -- PERSONAL TRAINING SESSIONS FROM JON JONES!!!
The planet's best female boxer tells TMZ Sports she's been in contact with the UFC superstar about some MMA lessons to get ready for a possible tilt with Nunes ... and it looks like those will all go down after Jones' fight with Dominick Reyes in February.
"He said after he fights, I could come down there a week or two and see how I feel doing MMA stuff.