Judging the performance of a player at an event like the Presidents Cup can be slightly tricky, in part because it's such a small sample size, and in part because results often depend so much on both playing partners and opponents.

Tom Kim accuses the U.S. team of unsportsmanlike behavior at the Presidents Cup, leading to a dispute among players.

South Korea's Tom Kim, an emotional spark for the Internationals against the United States at the Presidents Cup, said he and partner Kim Si-woo were cursed at by rivals on Saturday.Tom Kim said the emotions brought out unsportsmanlike behavior.