If we keep our present formation, to which Ferrara convinced himself it seems (and playing Tiago as a winger does say he convinced himself to the formation), Chamakh would be completely useless for us. After releasing Trezeguet, we won't need any new striker for the one starting spot.
A winger, preferably that could play on both sides, on the other hand, will be a must and for his sevices we should allocate the money Trez will free from the wage bill. I don't want to see De Ceglie as our left-sided alternative for Giovinco, he adds nothing to the team every time he's playing this season, while on the right Camoranesi can get injured or suspended at any time.