Henry Cejudo is DEAD SERIOUS about boxing Ryan Garcia ... and says there's already been talk about money and a location for the scrap.
TMZ Sports talked to 33-year-old Cejudo -- fresh off his UFC retirement -- and Triple C made it clear his ongoing beef with 21-year-old Garcia ain't just for the Gram ... he legit wants to box the undefeated pugilist.
"I really don't think [Ryan Garcia's] that good. I really don't, and I think with a proper team, the right game plan, I believe I can make him bend the knee in front of Oscar De La Hoya," Cejudo tells us.