Barcelona and Real Madrid are tracking Osasuna prospect Iker San Vicente.

The 16 year-old defender is regarded among Spain's best youth teamers and Osasuna are already facing a battle to keep hold of him.

Barca and Real are both eager to ferry Vicente away from Osasuna's academy, while Juventus are also monitoring his situation.

Sport says Osasuna are pushing Vicente to pen a first pro deal, but the teen is baulking at the demands.

Osasuna are keen to have a buyout clause inserted in the defender's deal - something which his representatives believe work against his career development.