After a successful loan spell with Werder Bremen he came back to Chelsea when Mourinho took over. Mourinho doesn't like young players in his team as they aren't the finished article so the lad got almost no game time and was sold in January. I'm sure there will be a few compelled to disagree with me but the facts speak for themselves. Mourinho doesn't trust young players.
Stupid reply. His age had nothing to do with it, it was his mentality. Jose had said whenever questioned on this that he couldn't promise De Bruyne games every week with Willian, Schurrle, Mata, Hazard and Oscar also playing. De Bruyne didn't like that and they agreed to let him leave. Mourinho also said if he had played De Bruyne every game, he wouldn't have been playing Hazard every game. You can't develope all these players at the same time.