Bryce Hall hasn't even thrown down in his first official boxing match yet ... but he's already planning #2 -- explaining Wednesday he wants a scrap with KSI badly!!!
The TikTok superstar -- who's all set for a celeb fight with YouTuber Austin McBroom next month -- said on "TMZ Live" he's got a beef brewing with KSI that he wants to settle in the ring next.
"KSI -- the one that beat [Logan Paul] -- was talking crazy about me," the 21-year-old said. "So, I mean, I'm down to do him next.