Say we didn't sign a central defender, how much of a travesty would it really be? We already have Ivanovic (who has been a brilliant defender for us over the years, if you exclude last season), Cahill, Terry, Zouma, Miazga, and also that young, promising defender from the academy (can't remember his name) too. Under a coach like Conte these players could easily operate at a top level again next season. Don't get me wrong, it is still important we sign another top centre back, but all I'm saying is we still have a good amount of quality defenders at our disposal. Haven't seen too much of Koulibaly, so hard to say how much he will improve us.