Chelsea aren’t going to get every transfer sale correct, largely down to the sheer quantity of players leaving the club in recent windows, but one exit in particular is now starting to look like a big mistake. There’s been a large turnover of individuals at Chelsea under this current ownership. While the media likes to focus on all the incomings, there’s also been so many departures. The Blues managed to sell several players in the summer window. In particular, they cashed in on a number of academy graduates to help with the Premier League’s profit and sustainability rules. READ MORE: Rating e…