Journalist Rudy Galetti reported, in information confirmed by Radio Marca Donostia, that the sporting management of Real Sociedad is monitoring Union Berlin's left-footed central defender, Diogo Leite. Real Sociedad has been in advanced negotiations to sign Diogo Leite, whose contract with Union Berlin is finishing. The club's technical secretariat has followed his progress for several transfer windows and is advancing negotiations for his transfer. There is strong international competition to sign him, but Real Sociedad is considered to have a sporting project to attract him.

Real Sociedad are interested in 27-year-old Diogo Leite, and Everton, Eintracht Frankfurt, and Beşiktaş are also showing interest in the player. The Portuguese left-footed centre-back is a free agent, as his contract with Union Berlin has concluded. The defender has 0 caps for Portugal and his current market value is €12.00m, according to Transfermarkt.