Rumours have linked four clubs speaking to Keiren Westwood and interest in Danny Fox but the Sky Blues have yet to receive a bid for any player still on the club's books.
Meanwhile, Guillaume Beuzelin, Michael Mifsud and Andy Marshall have left the club.
City opted not to renew the contracts of any of the three and all now have left the club after being paid up. Andy Marshall has interest from at least three clubs whilst Aberdeen have been linked with Beuzelin. Mifsud is expected to return abroad if his agent cannot get him a Championship club.