straight to your inboxPep Guardiola said Manchester City are missing Sergio Aguero as the Argentine's fitness struggles continue. City's coach had already decided that Aguero would not start the Manchester derby despite him scoring on his return off the bench against Marseille in midweek because of the Argentine's longstanding issues; he has only started three games this season and has had a few premature returns trying to shake off a serious knee issue that kept him out for five months.