The projection of 19-year-old Spanish centre-back Jon Martín has attracted the interest of several European clubs, including Real Madrid, which is now more actively studying signing him in future transfer windows. Other European clubs are monitoring the Real Sociedad central defender. In the current 2025/2026 LaLiga season, he has made 19 appearances and scored one goal. The Spain U21 international has earned 3 caps. Martín joined Real Sociedad in July 2024 and has a contract until 2031. His contract reportedly includes a €50 million release clause as of March 2026. His current Transfermarkt market value is €20.00m.