User blog comment:Imhungry4444/How strong is he really?/@comment-4094276-20110720174154/@comment-4094276-20110720211757

Luffy beat Enel's mantra, because of his fighting method, and Boa sisters kenbonshoku and busoshoku haki, without having to use his own haki to beat them. just the strength and speed of gear 2nd. Sentomaru could have been beaten if luffy was fast enough to hit him before Sentomaru could defend, it is even plausible that he could break through it (as Tekkai can be broken) if he were strong enough. The fact that he was easily able to keep up with Luffy shows that even without his haki, Sentomaru is still beast.