I notice in USTA leagues the captains often play their #1 players in the #2 or #3 slot, etc., depending on how they think the opposing team will place their better and weaker players. (This is called stacking if I'm not mistaken.) I realize this is part of the strategy of team tennis and I know that ethically it's not supposed to be done, but in my experience, everyone does it. So, I'm curious why the USTA doesn't require that at the beginning of each season that the captain must declare all their players as either #1, #2 or #3 players so that at every match the players are basically seeded and they play in the positions they should be in? Of course the captain could stack the whole season I guess, but I would think that would be pretty risky. There would also have to be some leeway I suppose if someone was injured or something.