Sumbu Kalambay was never someone that used strength and bullied, he was a mover so the weight may not be an issue.
He was a middleweight and worlds apart from Froch in boxing ability. I never actually saw Froch slip a punch - ever. Kalambay slipped them in his sleep. They are so far apart it's not even funny.
Although Froch has a pretty distinct size advantage, Kalambay's vastly superior skill and speed should see him to a decision victory. I recently re-watched Froch vs Ward, and it was painful to see just how clueless Carl was at times against people who could actually box well.
He looked equally awful against Taylor, Dirrell and Groves (1). Losing every minute of every round, round after round after round, without countering or feinting or doubling a jab once
