Cole and Anelka werent just potentials when they left Arsenal, anymore than Dele Alli is just "potential" right now. Ox is in the unproven category. Can has made the German team, hes still unproven. When I see for example Wilshere spend a long time at Arsenal, under Wenger, given a lot of chances, and not quite make the grade, then alarm bells start ringing. Maybe youre not as good as people think you could be. Why cant you develop to the next step at Arsenal, with chances, under Wenger. There might be reasons with Ox and Wilshere, e.g injuries etc.. but at the same time they have a decent run under Wenger. Theyre werent cut after 10 games.