According to SportsBoom, Real Sociedad hope that interest from Atlético Madrid could initiate a bidding war for Jon Martín.

According to a report from Fichajes, Atlético are preparing to compete with Real Madrid for the signing of Jon Martín. Martín is a 20-year-old Spanish center back who plays for Real Sociedad. The Spain U21 international has 4 caps, joined the club in July 2024, and has a contract until 2031. Recent reports from May 2026 mention a release clause of €60 million, and his market value is estimated by Transfermarkt at €20 million.