The transfer policy at Stamford Bridge can be mystifying to many fans, so what is the club's aims and who is in charge?
It is increasingly uncommon to find a head coach who negotiates their own transfers and Antonio Conte must work in conjunction with Michael Emenalo and Marina Granovskaia when it comes to strengthening his squad.
As Roman Abramovich's closest ally at the club, Granovskaia stakes a strong claim to being the most powerful woman in football. She has the mandate to both buy and sell players on behalf of the billionaire owner. Emenalo, meanwhile, is the technical director who overseas the club's scouting network and academy.