Move over KSI and Dillon Danis, there's a new boxing opponent for Jake Paul -- ex-NBAer Nate Robinson ... who tells TMZ Sports he's DEAD SERIOUS about wanting to fight the internet superstar.
It sounds random as hell, but let us explain how we got here.
Nate tells us he's been following Jake's recent antics VERY closely lately ... and he's sick of hearing Paul calling out weak opponents like a "bully."
So, Nate -- who's been training like crazy in the ring -- has the perfect solution .