Hmm just to answer one theory, about benfica buying jose enrique, i highly doubt it.
We dont tend to spend alot of money unless we really need to, we prefer to buy unknown players from argetina or brazil, or from other portuguese clubs for decently cheap then sell them for high profits. for example.
Fabio coentrao cost as nowt but we sold him for 27m
Di maria cost us 6m i think sold for 25m+2 players.
Ramieres cost us 6m sold for 18m.
So i dont think we'll spend big.
oh and also fabio is a right back by nature as hes right footed and its where he plays best, but he plays left back quite often as he's better than his brother at it and they've played for the same club their whole life, so it makes sense.