Everton are considering a summer move for defender Mateo Musacchio, The Sun report.
The paper claim the Toffees have sent chief scout Kevin Reeves to watch him in action, and claim the defender is worth £15 million, but his actual price could raise far beyond this.
Musacchio is a top option if the club cash in on highly rated John Stones, who they stopped leaving for Chelsea last summer.
His contract runs until June 2018 and includes a release clause of 50 million Euros, Inside Spanish Football previously reported.
Villarreal club president Fernando Roig was quoted stating only offers of this amount, £39 million, would see Musacchio move on, with no room for negotiation below this.
Everton's defence has been one of the weakest parts of their side this season, conceding more goals than relegated threatened Swansea City.
Villarreal resisted Tottenham's advances, leading the North London side making an ill-fated move for Federico Fazio instead, who has since been loaned back to Sevilla.
Musacchio suffered a bad ankle injury in April last year which kept him out of action until December, and he has since re-established himself in the side.
It is regarding his injury which Everton could hope to negotiate a lower price than his release clause, and even if they net £35 million plus for John Stones, it would be a very bold move to blow the whole lot on a single player as his replacement.