Who Owns the Space Above Me?

[carldog]

B1 applies pressure to A1. To protect the ball from tie up, A1 pivots on his left foot, stepping forward and backward with his right foot . A1 also swings the ball forward /up, then backward / down as he pivots. As the ball is backward / down by his right knee, with A1's right foot well behind his left foot and his hips turned sideways, B1 steps in a bit and reaches for the ball so that B1's chin is at A1's hip - belly. A1 then brings the ball rapidly forward / up and contacts B1 in his orthodontically perfect teeth with the ball (or forearm...or elbow..)

What's the call?

Thanks!