Chelsea may have been big spenders throughout the Roman Abramovich era, but in recent years they have made a strong commitment to buying young players - and in doing so, loaning them out to other clubs in order to give them first team experience.
A total of 26 players are currently owned by Chelsea but playing their football elsewhere - players such as Matej Delac, Kenneth Omeruo, Tomas Kalas, Mario Pasalic, Stipe Perica, Thorgan Hazard and Lucas Piazon are all plying their trade away from Stamford Bridge.
Another of those players is Marco van Ginkel. The 21-year-old midfielder had impressed with Vitesse Arnhem, and Chelsea saw enough in the Dutch international to pay £8m for his services. Yet almost a year ago today, Van Ginkel suffered a torn anterior cruciate ligament against Swindon Town in the Capital One Cup, which ruled him out for the entire season and ended his dreams of playing for the Netherlands at the World Cup in Brazil.
With Chelsea bringing in Cesc Fabregas, van Ginkel's first team opportunities were becoming more and more unlikely, and on September 1st, he joined AC Milan on a season-long loan deal alongside Blues team mate Fernando Torres.
Still recovering from his injury, Milan had been cautious over van Ginkel, and it was only yesterday that manager Pippo Inzaghi declared that it may be time to hand him his first start against Empoli - which he got.
Yet just 30 minutes into his return, van Ginkel was stretchered off with another injury, this time with ankle heavily strapped. The news is a big blow for Chelsea's hopes of seeing the midfielder develop in Serie A, but they have to be relieved that it isn't his knee again, and will await a prognosis in the coming days.