According to Mundo Deportivo, Newcastle has submitted an offer for Joaquín Martínez Gauna, who is also known as Oso.

Newcastle and Nottingham Forest are both interested in signing the 22-year-old Spanish-Argentinian Sevilla left-back, Oso. In the 2025/2026 LaLiga season, he made 21 appearances, scoring 2 goals and providing 3 assists. His contract with Sevilla runs until June 2027, and his current market value is €10.00m, according to Transfermarkt. In May 2026, potential transfers were valued at an estimated €5 million.