Zhilei Zhang knocked out former WBC heavyweight champion Deontay Wilder at the 1:51 mark of the fifth round in a heavyweight main event Saturday at Kingdom Arena in Riyadh, Saudi Arabia.
Zhang landed a right hook that stumbled Wilder, who turned his back. Zhang sent Wilder to the canvas with another right punch to the head.
Wilder returned to his feet to beat the 10 count, but the referee waved off the fight after he still appeared hurt.
