User blog comment:Neowitch/709 - Defensive Attitude/@comment-1889545-20130516164314/@comment-1595565-20130517031153

The tournament roster says so, actually. Robin isn't in the tournament while Luffy is. So the smart money says that those two are going to fight, rather than little Barty and one of Luffy's coworkers, if there's even cause for the two crews to combat each other at all.