Couple of things I've picked up on, and this is just my opinion on things.
1. Starting Son will send the wrong message to a lot of the squad. Lamela scored and assisted vs City, dropping him would dent his confidence and send a bad message to the squad. Lucas deserves a start in my opinion as well. Granted Son is one of our very best players, and we are a better team with him starting, but I don't think Poch is the sort of man to throw him straight back in.
2. I don't understand all these calls to drop Eriksen? He might want to leave, but we are still his employers and paying his wages. For as long as he's a Tottenham player, he should be playing. Again, we are a better team with him in the starting line up.
3. I reckon we'll see Alderweireld drop out of this one, and Vertonghen start alongside Sanchez so Toby gets a rest. Then potentially see Toby and Jan at the back vs Woolwich.