It’s back to the drawing board for Mikel Arteta as Arsenal suffered their second defeat of the season on match day 10. Newcastle United took the lead in the 12th minute through Alexander Isak, a goal that was the match winner as Arsenal failed to threaten the Magpies. Arteta’s side were far from their best and were unable to return to winning ways after a defeat and a draw. It’s now three Premier League games without a win for the Gunners, giving Arteta plenty to think about after the opening 10 fixtures. READ MORE: Five things we learned as Arsenal suffer damaging 1-0 defeat vs NewcastleMikel…