Jake Paul Wants McGregor After Nate Diaz, 'Biggest Fight In Combat Sports'

Jake Paul doesn't step in the boxing ring for another three months, but he's already got his sights set on his next opponent after Nate Diaz ... and it's none other than Conor McGregor!!

The Problem Child -- who's fighting Diaz on Aug. 5 in Dallas -- laid out his plans to Babcock on the "TMZ Sports" TV show on FS1 ... saying he fully intends to knock Diaz out (something Conor never did), and then lock in a fight with Notorious.

Of course, Nate and Conor have one of the greatest rivalries in UFC history ... and with their series tied up at one win a piece, Diaz wants to take care of business against Jake and then revisit his old nemesis one last time.

But, Jake says he's going to spoil Nate's plans of a trilogy fight by jumping him in line for a shot at Conor ... and he thinks McGregor will have "no choice but to make the biggest fight in combat sports."

Paul -- 6-1 as a pro boxer -- understands Conor would need permission from UFC honcho Dana White to make the fight happen ... but he seems optimistic that the money would do enough talking to get him to agree.

Remember, Jake has gone after a fight with McGregor a few times in the past ... trolling the UFC superstar nearly every chance he's gotten over the years. McGregor has fired back from time to time too -- but they haven't been able to mix it up in a ring.

If a fight does eventually go down, Jake says he's hopeful it'd be a boxing match ... but he told us he ain't opposed to MMA either.

"We can do a two-part series," the 24-year-old said. "One boxing, one MMA in PFL. Make it happen, no problem."

What do you say, Conor???