The 28 - year - old England star is out of contract at the end of the season .
City 's concern is that star could leave on a free if they do n't get star to sign an extension in the months ahead .
The 28 - year - old England star is out of contract at the end of the season and City 's concern is that he could leave on a free if they do n't get him to sign an extension in the months ahead .