A brilliant article on Hayden and how a flamini challenge changed his career:
https://amp.theguardian.com/football...mpression=true
And note:
Great planning and man management by Wenger No wonder we're so tactically shit.Hayden tells the story of his Arsenal debut at West Brom in September 2013 and how, after Wenger had named him in the squad but excluded him from the team shape drills, he assumed he would be a substitute. When he got to The Hawthorns, it was the kitman, Vic Akers, who told him he was starting. Wenger then dropped another bombshell; he would be in midfield. He had been used purely as a centre-half in training and, even after the game, in which Hayden played well, the manager continued to push him as a defender.
And to do that to a young player no wonder players like Theo have turned out crap.