According to Gazzetta.gr, Rayo Vallecano has a strong interest in Joel Roca.

According to Italian journalist Matteo Moretto, both Rayo Vallecano and Osasuna have inquired with Girona about the terms for a potential transfer of 21-year-old Spanish player Joel Roca. The left winger is under contract with the Catalan club until the summer of 2029 and is also reportedly the subject of strong interest from Olympiacos. Roca joined Girona in July 2024. In the 2025/2026 LaLiga season, he made 32 appearances, scoring 3 goals and providing 1 assist. The winger has been capped 4 times for Spain's U21 team, scoring 2 goals. According to Transfermarkt, he has a current market value of €6.00m.