César Luis Merlo reports that Tobías Rubio, a 22-year-old Argentine right-back, is transferring from Racing to Unión. The move is a one-year loan deal that includes a purchase option for 50% of his rights. Rubio joined Racing in July 2023 and has a contract until December 2027. He made two appearances in the 25/26 Torneo Apertura. His current market value is €300k, according to Transfermarkt.