The 31-year-old defender is currently subject of interest from Galatasaray with the club looking to complete a move before the the Turkish transfer window closes on Wednesday evening.
Toure has not ruled out remaining at City, however, but he will not be eligible for the club's European games if he remains at the Etihad.
Ahead of competing against the likes of Real Madrid and Juventus in the competition's stand-out group, City have selected new signings Javi Garcia, Scott Sinclair and Jack Rodwell with the latter looking to make his Champions League debut.
City's squad includes 25 senior players in addition to a further 17 Under-21 'B' players.
Full squad (* denotes B list):
|Eirik Holmen Johansen|
|Courtney Meppen Walters*|