The Tournament is a game mode in Head Soccer that requires the player to advance through three seperate knockout stages as any of the characters available. It is used for unlocking other teams and grinding for points, as the first win will award the player 100 points, the second one 700 points and winning the final round will award the player with a whole 1,700 points. The possible opponents are completely random. After you have cleared the Tournament, you get to choose between three Headballs to win yet another reward.
Playing tournament won't give you many points, so if you need points, play in other modes.
Sometimes if you are in the Tournament final there comes a UFO. If the ball touches the UFO, it will crash and then your opponent is gone, the match restarts and you must play against Kepler 22B. If you win against him for the first time, you unlock him. However, the UFO can appear later again.