TOKYO (AP) — After eight games at the Club World Cup, few conclusions were reached about the effectiveness of goal-line technology.

The tournament was the first to feature goal-line technology. The Magnetic-field-based system GoalRef was used at Yokohama Stadium, while Toyota Stadium was equipped with the camera-based Hawk-Eye system. There were no close calls, however.

Both systems relay information to the referee via a vibrating wristwatch in a split second. They passed all pre-game tests with no problems but were never called upon to determine a goal at Japan.

FIFA president Sepp Blatter said goal-line technology is being well-received by the referees.