Sandbagging

Sandbagging is the act of playing poorly on purpose. Most of the time, players sandbag in friendly matches to keep others from learning their style, or to be allowed into easier divisions for tournaments. Other times, in professional matches, when a small amount of money is on the line, players sandbag in hopes of winning more money at a later time.

Isai is known for his extreme sandbagging. Except he's so good he wins anyways.