Atlético fans could be willing to entertain offers in this transfer market
The player and the 'colchonero' team have been negotiating their departure from the Metropolitano for several weeks.
The Senegalese forward is one of Chelsea's discards after the signings of Liam Delap and Joao Pedro.
After Nico Williams' rejection, Barcelona could go all out for the signing of Julián Álvarez, a striker from Atlético de Madrid.