By Andy Dunn FAIR play to the television director, no sooner had Bukayo Saka persuaded a left-foot shot to duck inside Manuel Neuer’s right-hand post, the shot on your screen at home was of Harry Kane’s glum face. Mind you, Harry was no glummer than Eric Dier, who had stood, watched and pretty much invited Saka to open the evening’s scoring. “Eric Dier, you’ve always been not very good,” sang a congregation composed exclusively of Arsenal supporters. Well, lyrics to that effect anyway As far as the TV man or woman was concerned, it could have been the first chapter of a story that ended with t…