Dillian Whyte exacted his revenge -- and regained his WBC "interim" title belt -- in emphatic fashion as a huge right hand followed by a violent hook to the jaw scored the fight's only knockdown and ended matters at the 2:39 mark of round four.

Alexander Povetkin, who looked every day of his 41 years thanks to his horribly unsteady legs -- regained his feet by the count of four, but the fight was stopped moments later when Povetkin's corner threw in the towel.

Whyte's exceptional jabbing (17.8 attempts/6.8 connects per round to Povetkin's 5.0/0.5) set the table for the rest of his offense, which helped him forge leads of 57-8 overall, 27-2 jabs and 30-6 power.