Filipe Luis is battling to convince Atletico Madrid to sell him to Chelsea.
The Daily Mail says Luis may have to pay cash himself to force his move to Chelsea.
The Brazilian left-back has pleaded with his club to let him leave for less than his £19million buy-out clause as Chelsea believe it is over-priced.
Chelsea also have an interest in Atletico centre-back Joao Miranda.
David Luiz was sold to PSG for £50m earlier this summer, so Chelsea have money to spend.
