We investigated decision-making and interpersonal coordination under constraints, such as posture of the opponent and angular relations of the performers to the scoring target, in basketball. Affordance-based decisions of the attacker, of which side to drive to the basket, depended on feet positioning of the defender, at small interpersonal distances scaled for each dyad. The alignment between the attacker and defender to the basket constrained the decision of the attacker of which side to move past the defender. To succeed, attackers moved quickly in order to increase their relative angle...