Fresh off his controversial loss to KSI, Logan Paul tells TMZ Sports he's already thinking about his next opponent -- and it could be CM Punk or Dillon Danis!!

Of course, the 24-year-old YouTube superstar is coming off an impressive 6-round slugfest against KSI at Staples Center on Saturday ... and it's obvious he's not ready to hang up his gloves just yet.

Remember, KSI said he's NOT down for a 3rd fight with Logan -- but suggested Paul move to MMA to fight CM Punk next ... so naturally, we asked LP if he was down.

"I am ... I think I would destroy CM Punk if I'm being honest," Logan says. "I don't know if anyone would disagree with that."

41-year-old Punk is 0-2 in his pro MMA career -- he was choked out by Mickey Gall at UFC 203 in 2016 and got beat up badly by Mike Jackson at UFC 225 in 2018.

Paul tells us ... he would consider other opponents if he couldn't work out a deal with Punk.

As for Bellator fighter Dillon Danis -- Conor McGregor's good friend -- he's publicly called for a boxing match with either Logan or his little bro, Jake Paul. Logan says DD might get his wish.