Chelsea is often criticized for their treatment of the young players. No club has as many talented players under their name while, at the same time, not having those players with them. It is a classic case of keeping the best for yourself, more because you don’t want someone else to lay their hands on it before you do and less because you actually need it.
Because, who knows, they might as well need one of them someday, right?
Source : https://www.sportskeeda.com/football/benching-david-luiz-was-a-masterstroke-from-antonio-conte