Jon Martín, a 19-year-old centre-back from Lasarte-Oria in the Basque Country, has rapidly established himself as an indispensable starter at Real Sociedad (the San Sebastián-based club also known by their Basque nickname, La Real), progressing from a carefully managed development plan to a first-team regular far ahead of schedule. The teenager, who is contracted to the club until 2031 with a reported €50 million release clause, recently scored his first professional goal and played a decisive role in Real Sociedad's Copa del Rey final victory over Atlético de Madrid, winning aerial duels against high-profile forwards Julián Álvarez and Alexander Sørloth. His rise carries a notable family dimension: his father, Shanti Martín, also wore the Real Sociedad shirt and made his debut against the same Atlético de Madrid — in the club's 1987 Copa del Rey campaign — while Jon has also earned regular call-ups to Spain's under-21 national team.