• Beterbiev (20-0, 20 KO) faces Bivol (23-0, 12 KO) in Riyadh
• Russian foes meet for WBA, WBC, IBF and WBO title belts
• Wardley ethers Clarke in one for British heavyweight title
• Send Bryan a tweet at @BryanAGraham or email him

A sensational first-round knockout in the co-main event at Riyadh’s Kingdom Arena. Wardley detonates a concussive overhand right hand on Clarke’s jaw that badly hurts the Tokyo Olympic bronze medalist near the end of the opening frame, then unloads until Clarke goes to the canvas in a heap. Clarke makes it to his feet but he’s simply not there and referee Victor Loughlin correctly waves it off.

That means there will be a nearly hour-and-a-half wait until the main event, which cannot begin until 1pm local time (11pm in London, 6pm in New York).