Jake Paul isn't duking it out with Anderson Silva 'til next month, but he's already got his eyes on his next opponent after Spider ... telling TMZ Sports he wants to "slap the Stockton out of" Nate Diaz!!
37-year-old Diaz hinted at making the switch to boxing after his big win over Tony Ferguson on Saturday ... which certainly got Jake's attention, considering Nate's UFC contract has ended.
We spoke with Paul at his news conference on Monday .