Guess how Rafael Mendes finishes his third match at the 2013 Rickson Gracie Cup

Earlier this month the Mendes brothers went to Japan for the 2013 Rickson Gracie Cup. Rafael Mendes won the lightweight division and closed out the open weight alongside his brother Guilherme who won the featherweight division.

All of their matches were ended with a submission but can you guess beforehand what Rafa submits with in this match?