The Sun suggests that City are not willing to let Bayern have Sane without making a move of their own.
And the paper suggests that City would target Bayern star Serge Gnabry.
The German winger has been a sensation for Bayern this season, and the 24-year-old is wanted by Pep Guardiola.
If Sane wants to go back to Germany, Guardiola would ask for Gnabry in return in any transfer.
Bayern are unlikely to have any interest in parting with their talent, which could dissuade them from making a move for Sane.