Gervonta Davis ends 421-day layoff with eight-round destruction of Frank Martin

• Davis defends lightweight title with eighth-round KO
• Baltimore native improves to to 30-0 with 28 knockouts
• Gervonta Davis v Frank Martin - as it happened

Gervonta Tank' Davis made a triumphant return to the ring after more than a year away, dominating Frank Martin and knocking him out at 1:29 of the eighth round Saturday night to retain the WBA lightweight championship.

Davis delivered a right and two lefts to Martin's face to send the Indianapolis resident to the canvas for his first career loss after he won his first 18 fights. Tank again proved to be one of boxing's most ferocious punchers, improving to 30-0 - all but two by knockout.