Sevilla president Jose Maria del Nido has warned that any bid for Geoffrey Kondogbia this summer will be considered an "attack" against the Andalusian club.
The midfielder - who was part of the successful France side at this summer's Under-20 World Cup - has long been linked with Real Madrid and Juventus, but Del Nido is determined to keep hold of him for the 2013-14 campaign.
“Kondogbia is not on the market,” he told reporters at the unveiling of new signing Sebastian Cristoforo. “But whoever wants him has to pay his €20m clause.
“But please: any team that tries to sign him – don’t. We will consider it an attack.
“I’ve already reached an agreement with [third-party owner] Doyen and Kondogbia will not be leaving this summer.”
Sevilla have already seen the likes of Alvaro Negredo, Jesus Navas and Gary Medel depart the club this summer, and will be eager to keep Kondogbia, who shone in the recent 3-1 friendly win over Manchester United.
The 20-year-old joined the Liga side from Lens last summer.