Vladimir Klitschko has retained his WBA, IBF and WBO heavyweight title belts, sending challenger Tony Thompson to the canvas in the sixth round of the bout in the Swiss city of Bern.
Klitschko first knocked the 40-year-old American down with a big right near the end of the fifth round at Stade de Suisse.
The Ukrainian pushed the tempo and dropped Thompson again in the sixth, and referee Sam Williams had nothing left but to stop the fight.
This was a rematch of the fighters’ 2008 bout, where Klitschko needed 11 rounds to stop Thompson.
The 36-year-old’s record has consequently improved to 58 wins, including 51 KO's and 3 losses.
Thompson, who was the mandatory challenger nominated by the IBF, fell to 36-3.