Alves, 32, has joined Sepahan on a two-year deal. He was a key player for Tractor last season, helping the team win the Iran Pro League for the first time in its history.
Tractor claims Ricardo remains under contract with the club, casting doubt on his move to Sepahan.
Sepahan, led by Moharram Navidkia, will face Al-Duhail of Qatar on August 12 in the Khalifa International Stadium in Al Rayyan in the 2025-26 AFC Champions League Elite playoff.