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WWE superstar Paige could go from sports entertainment to REAL DEAL FIGHTING ... telling TMZ Sports she's seriously considering a move to MMA.

We spoke with 2 time WWE Divas champ and her boyfriend, Alberto Del Rio -- who happens to be running the rapidly growing Combate Americas MMA league.

Alberto -- who did some MMA fighting back in the day --- shot down any hope of returning to action, but said there's a real chance Paige gets in the cage.