User blog comment:JustSomeDude.../759 - So That's a Thing.../@comment-24769684-20140904150732/@comment-220.255.2.101-20140904154735

Well, the Doflamingo Luffy hit spat blood out, so it's most likely the real one (the Black Knights should just catch fire from Luffy's fists since they are made of string). Maybe Doflamingo is much stronger than we thought, since he can probably stitch his injuries using string or regain his composure in the nick of time.