User blog comment:Alelucas/Audacious Predictions after One Piece Chapter 820/@comment-107.135.88.238-20160322000417/@comment-4374114-20160322004615

You reference he couldn't defeat Doflamingo, but Doflamingo could not defeat Luffy on his own either. If you look at the full course of the day Luffy fought a former legend, amongst other gladiators, minions to get into the palace, minions and upper family to get back to the palace, Bellamy, and Trebol. There is much more than that one battle, same as all of Luffy's other big battles, than just the final guy. Each time he has endured much that same day and then finally fights through exhaustion to finally win.