When Ayew collects the ball van Aken is in the correct position, he's literally forcing Ayew to move centrally while preventing a shot by blocking sight of the goal. Note Wildsmith positioning
When Ayew takes his shot van Aken has clearly moved along tracking his player and still prevented the shot, can't ask for anything more (unless you want him to make a rash challenge of a tricky forward in the box).
Note Wildsmith literally hasn't moved. At all. One yard to his right to track Ayews movement wouldn't have put the goal at risk as VA is in the way. And would hav