Lot of scientific literature have demonstrated that the presence of visual distractors asymmetrically placed nearby a visual target affects the trajectory of a motor task directed toward that target. Many different experimental conditions have been reported resulting in very different types and amounts of effects on the resulting trajectory. Because most of these experiments have been done in laboratory setups, the aim of the present experiment was to evaluate if visual distractors can be present during common sports, affecting the precision of the motor task and the result of the performance. Fourteen young basketball players were asked to perform sixty basket strokes from a central position behind the 3 points line of a regular basketball ground, while an opponent player stayed in front of him alternatively in a center, left or right position and with both arms stretched up. The final trajectory of the ball, at its arrival on the basket, was recorded with a computerized system and the lateral deviation of the trajectory from the midline was computed. The results showed a significant effect for the position of the opposing player on the lateral error of the stroke, with a deviation of the trajectory toward the side were the opposing player was. This result confirms that during a common basketball game some visual distractors can be present; further studies should evaluate to what extent these distractors can affect the performance of the players.