Joaquín Martínez Gauna, a Spanish-Argentinian player known as Oso, is an alternative for Real Sociedad's left defensive flank. AS reports that the 22-year-old is valued by the technical staff at Zubieta for his versatility and range. After a positive season at Sevilla, where he made 21 appearances, scored 2 goals, and provided 3 assists in LaLiga, his performance has also attracted interest from Argentina's national team coach, Lionel Scaloni, for a potential future call-up. Real Sociedad is not the only interested club, as several teams in La Liga and from abroad have inquired about his contractual situation. His current contract expires in June 2027. His current club, Sevilla, considers his continuity a priority, is working on a contract extension, and is optimistic about reaching an agreement. Real Sociedad's director of football, Erik Bretos, is considering the move, but any negotiation is dependent on player departures from the squad, and the club is evaluating the economic cost before making a formal offer. Reports in May 2026 indicated a potential transfer could be valued at €5 million, excluding bonuses.