Chelsea manager Jose Mourinho says owner Roman Abramovich is curbing his spending in order to comply with financial fair play (FFP) regulations.
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Despite having just spent 25 million euros on signing Nemanja Matic from Benfica, Mourinho feels the Blues are at a disadvantage compared with a number of other free-spending clubs .
And in a thinly-veiled swipe at his side's rivals, the Portuguese claims Chelsea have made a conscious effort to comply with FFP regulations, while others have chosen not to.
"If the financial fair play comes into place, it should come for everybody, not for some," Mourinho told Sky Sports News. "Chelsea at this moment is working very, very well, thinking that the financial fair play is going to be in place and we have to obey certain rules.
"[But] our owner [Abramovich] is still the same owner and his passion for football is still the same. If we are free to spend our owner is more than happy to be free to spend. Our owner is respecting the new rules that we are waiting for and hopefully, for the good of football, it's for everybody, not just for some."
Mourinho added: "We think about ourselves, we work in a balanced way. We are building a team. We will build the team without the massive investment in the short period of time like some clubs are still doing."
Meanwhile, the Chelsea boss underwent an operation on a fractured elbow in Paris on Monday. The injury is not believed to be serious however, and Mourinho will be at the FA Cup fourth round clash against Stoke on Sunday.
The Blues confirmed the news via their official Twitter account.
Jose Mourinho today underwent a minor arthroscopic procedure on a long-standing elbow complaint. He will return to work tomorrow. #CFC— Chelsea FC (@chelseafc) January 20, 2014