Last night on a fight card at Konig Palast in Krefeld, Germany, Felix Sturm and Karoly Balzsay retained their world title belts by stoppage. As expected, WBA Middleweight Champ Sturm, 32-2-1 (14), wasn’t pushed hard by his inexperienced challenger, Japan’s Koji Sato, 14-1 (13), and was able to control the bout with his superb jab….