Set Plays at a Throw-in (attacking) ( 4)

This particular throw-in, or the success of it, depends on timing and the movement of the attacking players.

T (the thrower) has the ball and considers the merits of throwing to X4 or X3 who are both marked by D3 and D2.
But X2 walks towards him (from less than 6 metres away) as if he wants to take the throw-in himself.
Defender (D1) is close-by watching the thrower T and X2.
But as X2 is about to be handed the ball by T, he sets off quickly down the flank as in the diagram.
And just before he does (X4) and X3) make sharp moves infield to take (D3) and (D2) with them – thus creating a space down the flank for T’s throw for (X2) to run on to.
(X4) and (X3)’s run are vital – but should their markers not move with them then it would be up to T to assess the next possibility as (X4) or (X3) would then be unmarked.
The timing and accuracy of the throw and (X2)’s run are vital to the success of this tactic, - but clearly (D1) should be caught out and X2 should be in the clear in possession.