Well, sure, but who knew that in the summer or, indeed, even a few months ago? And I'm not talking about "knowing" in the sense of referring to Murphy's law ("It's always a season-ending injury whenever an Arsenal player picks up something!") but rather in the actual sense of the word. He's a player we've got on our books. You can't stack up on players for fun unless you're City or, indeed, Chelsea.
... and I don't agree that they were second-rate players at all. I think Kos is a quality centreback who's done a good job this season despite being put in a difficult position. He's a bit rough around the edges but so is Luiz.
