Play video content EXCLUSIVE APRIL 2019 TMZSports.com

UFC star Israel Adesanya says a fight with Jon Jones "does tickle my loins" -- and he's warning the light heavyweight champ, "I already killed one G.O.A.T. and I'm hunting the next."

Of course, before Israel can fight Jones, he's gotta get through Kelvin Gastelum at UFC 236 on Saturday (on ESPN+ PPV) in a huge middleweight interim title bout.

But, if he beats Kelvin, there's a path to Jon Jones -- who's already told TMZ Sports he's very "excited" about a matchup with "The Last Stylebender."

When we spoke with Jon back in March, Israel was already on his radar -- and he told us, "I've got a feeling me and him will eventually fight each other."

Play video content 3/2/19 TMZSports.com

Israel says he doesn't want to think TOO much about Jones because he's gotta stay focused on Gastelum ... who's chalked up some pretty impressive victories over guys like Michael Bisping, Johnny Hendricks and Tim Kennedy.

Israel's resume ain't too shabby either -- back in February, he defeated UFC legend Anderson Silva, the "G.O.A.T." he was referring to earlier.

By the way, the fight's going down in Atlanta -- home to one of the most famous strip clubs on the planet ... and if Israel beats Kelvin, he's already got a plan to celebrate!!