Arsenal’s pre-season is well underway and with a game against Manchester United this weekend it’s another chance for some younger players to impress. The Gunners have travelled to the USA once more and after playing against Bournemouth already and winning out on penalties, they’ll be keen to see of United on Sunday. For Arsenal manager Mikel Arteta, these pre-season tours are often a chance to take a really close look at some of the youngsters at the club. Against Bournemouth, Arteta started a few of them as well, with the likes of Ethan Nwaneri, Myles Lewis-Skelley and goalkeeper, Karl Hein, …