Legal guarding position

[Mark T. DeNucci, Sr.]

Originally posted by tjchamp
Not even sure how to explain this one, but I will give it a whirl. Player A1 has ball, right leg is extended in front of body, and right foot is pivot. A1 has all weight on back foot. Defender B1 then straddles A1's right foot, but remains vertical. A1 then pivots her weight back onto the front foot causing contact with B1 sufficient that a foul should be called. Who should get the foul?

Foul by B1.