Napoli have reportedly rejected a £50m bid from Chelsea for striker Gonzalo Higuain.
Blues owner Roman Abramovich may be willing to bankroll a higher offer for the Argentine as the club prepares to make a second approach, according to The Telegraph.
However, the Serie A outfit are said to be adamant that Higuain is not for sale at any price.
The news follows reports that Napoli have made tentative enquiries about the availability of Chelsea midfielder Juan Mata.