Real Madrid have upped their demands for forward Alvaro Morata, according to the latest reports in Italian newspaper Tuttosport.
There are reports in the English media that Arsenal officials have flown to Spain in an attempt to land the signing of the 21-year-old star.
Morata found the net eight times in 23 games in La Liga last season but has become frustrated with a lack of first-team opportunities at Real.
Arsenal appear to be in pole position to sign Morata but the paper claims that Real Madrid president Florentino Perez is increasing his demands and is currently asking for at least £16 million.
Real will also reportedly ask for a buy-back clause, which will allow them to bring Morata back for a slightly higher sum if they decide they wish to within two years.
Tuttosport believes that Juventus are now outsiders to sign Morata and that Arsenal are favourites with Liverpool also interested.
Juventus may instead focus their attention to Barcelona star Alexis Sanchez who they have reportedly entered talks with.