It’s still very early but Mikel Arteta’s side are playing with an authority and freshness that eluded them at times last season Sign up for our free newsletter here Three league games played, three games won . For Arsenal this season could only have started better if Manchester City, who look like being one of their two most serious challengers, had dropped points. But it’s not just about results: Arsenal have been comfortably the better side in each of those three games, approaching each of th…