City are currently pushing to secure the Belgium international to a new contract, with manager Pep Guardiola confident an agreement will be reached.
In the meantime, Patrick de Koster has confirmed he is in regular contact with suitors Real and Barca.
"As far as Barça and Real Madrid are concerned, there are still informal contacts with representatives of these clubs," De Koster told La Deurniere Huere.
"But Kevin has only one wish: to stay in Manchester City. He is extremely happy at all levels."