Journalist Dean Jones has claimed that Manchester City could sell one player in the summer. The mark of a top club is that most of their players rarely ever demand an exit and Manchester City fit that description. The same observation can be made about Real Madrid and Bayern Munich over the past decade. Journalist: One player could leave Manchester City in the summerMichael Brown feels one player Manchester City could sell in the summer is Jack Grealish. READ MORE: Who is Jack Grealish? Step into the hedonistic world of Man City’s £100m wingerInterestingly enough, Dean Jones made the same clai…