Logan Paul kicked Dillon Danis' ass, dominating his rival and winning by unanimous decision ... before a melee erupted in the ring!
After weeks of trash talk so intense it sparked a lawsuit and restraining order, the men finally got to punch each other, battling in the co-main event at the AO Arena in Manchester in front of a packed crowd ... including Paul's fiance Nina Agdal and brother Jake Paul.
Logan came out hot … and was the far more aggressive fighter in the first round, throwing and landing punches, including some heavy body shots.