Black 4 attempts a field goal. White 20 taps the ball away from the basket and the referee calls a basketball interference and awards 2 points to Black 4. Article 31.2.4 Interference occurs when: A defensive player touches the ball or the basket while the ball is within the basket, thus preventing the ball from passing through the basket. Article 16.1.2 The ball is considered to be within the basket when the slightest part of the ball is within the basket and below the level of the ring. Outcome: Correct decision from the referees. The ball had some part inside the basket and below the level of the ring, so it is considered to be within the basket. 2 points shall be awarded to Black 4.