[JugglingReferee]

I do not have a foul, but that's after seeing the play in slow-motion replay.

In real time, I can see if one, me included, were to call this a foul.

Just one fact first: the contact occurred when the ball was out of A1's hands.

What I see is two players moving along their chosen paths. The offensive player's path is created first when he moves parallel to the end line. (He happens to be facing away from the basket - but the direction he faces doesn't matter.) After A1's path is established, defensive player B1 begins his path. They collide because the chosen paths of the two players intersect.

Since the offensive player established his path first, the onus is on the defensive player to avoid illegal contact.

The million dollar question is:

Does a player giving up player possession need to give time and distance if said player is committed to an established path? I say "no".