Richarlison is at the centre of a three-way battle from London clubs for his signature in this summer's transfer window.
The Brazilian had attracted the interest of Arsenal and Tottenham before Chelsea joined the race for Everton's most valuable asset. It is believed the Toffees will not be willing to negotiate at a price less than £50million - roughly what they paid to lure Richarlison to Goodison Park from Watford in 2018.
Thomas Tuchel's side will be in the market for attackers as they are set to lose Romelu Lukaku, who is on the brink of a return to Inter Milan on loan.