The player. Game 1, Curbo chooses Cage. Fine, it's his main. He loses. He then KEEPS WITH CAGE for one more game, going down 2-0. That's a foolish decision, and that is possibly what cost him the match. And decision making is part of player skill. Incidentally, REO also plays a pretty good Kenshi, whom he could've used had he known that Curbo might pick Jax.