I don't think he fights scared. To me, "fighting scared" is fighting to survive: to not care about winning, just to stay upright. I would say David Haye and Ibragimov fought scared against Wlad. They were losing the fight, they knew they were losing the fight, yet they refused to take the risks necessary to try to win, they were happy with going the distance.

If you're winning the fight and you're fighting conservatively, that's called fighting smart. Floyd, Wlad, Rigo, Ward, ect don't fight scared, they fight smart.