Real Sociedad is on the lookout for a left-sided centre-back following the departure of Duje Caleta-Car, and 22-year-old Lautaro Rivero from River Plate is in the club's sights. After winning the Copa del Rey, Real Sociedad's sporting department, led by Erik Bretos, opened contacts with the Argentine club two months ago. River Plate is also considering selling some of its players, which could facilitate negotiations. Rivero is an attractive player who has caught the attention of several clubs in major European leagues. However, the Argentine club needs to make sales before accepting any offers. River's operations director, Longoria, values Rivero and believes that a season alongside Nicolás Otamendi could increase his market value. Real Sociedad also has other options on their list of defenders, aware that the Argentine is being pursued by several teams. River Plate has set a release clause of 100 million euros to protect against cut-price exits and to guide negotiations.