In recent years (or "The Abramovich Era," as it's also known), Chelsea have been a buying club, for obvious reasons.
The club has thrown money at talent from all over the world in the hope of making Chelsea a top European force.
With all of these players coming in, some players inevitably have to be shown the door—such is business.
But who are the players that Chelsea may wish they would have held on to a bit longer?
The five players on this list proved their true talent and worth after leaving Stamford Bridge, unfortunately for Chelsea fans.