We have spent not so much money during this mercato, so I assume we have capabilities to throw about 20m for a top quality defender and Zapata would be my choice. If not, then Felipe should be available for a more suiting our board sum.
If we aim to buy a young promising defender and Zapata is out of reach, then Kompany is a very good solution, he's solid and does miracles at times. If we aim to buy or loan an overrated youngster from EPL then Senderos, although being mediocre, at least played sometimes last season unlike Ivanović. What I mean is that Ivanović isn't a solution at all in our situation, even Stendardo/Campagnaro/Dainelii would do better, because they know Serie A well and can play at predictable decent level at once.