Guido Vianello needed less than three minutes to keep his perfect record intact Tuesday night.

The Italian heavyweight prospect dropped Don Haynesworth with a right hand and stopped him in the first round of a scheduled six-rounder in Las Vegas. Referee Jay Nady stopped their televised bout 2:16 into it at MGM Grand Conference Center.

ESPN aired Vianello’s victory as part of the Shakur Stevenson-Felix Caraballo undercard.

The 6-feet-6, 239¼-pound Vianello, who represented Italy at the 2016 Summer Olympics, has knocked out each of his seven pro opponents. The 36-year-old Haynesworth (16-4-1, 14 KOs), who weighed in at 294½ pounds, has lost three of his past six bouts by knockout.

A hard, overhand right hand by Vianello drilled Haynesworth, who was bent over, and sent him to the canvas with just over a minute remaining in the opening round.

A stunned Haynesworth got to his feet before Nady counted to 10 and seemingly wanted to continue. Nady still stopped the fight. 

Keith Idec is a senior writer/columnist for He can be reached on Twitter @Idecboxing.