MMA champ Kayla Harrison -- one of the baddest fighters on the planet -- is going scorched Earth on Gervonta Davis after the boxer got physical with his baby mama.
As we previously reported, 25-year-old Davis -- the reigning WBA lightweight champ -- got into a heated altercation Saturday night with his ex-GF at a celebrity basketball game in Miami.
Davis claims he "never once hit her" but admits he "was aggressive." The video appears to show Davis using his strength to rip the woman out of her chair in a fit of anger.