Chelsea continue to sell on youngsters that have developed in their academy, but the incredible production line of talent doesn’t seem to be running out. The Chelsea academy really has been a great source of players for the first-team squad in recent years. There’s also been some big sales of academy graduates, too. Unfortunately, Conor Gallagher, who came through the club’s youth system, is about to leave to join La Liga side Atletico Madrid. There’s widespread reports in the media that the Blues midfielder is on the brink of joining Atletico. Andy Townsend has expressed disappointment about …