By James Cormack Arsenal must rid themselves of their Tyneside nightmare when they take on Serie A champions Inter in the Champions League on Wednesday night. The Gunners performed as poorly as they have in a very long time under Mikel Arteta’s watch at Newcastle on Saturday, falling to a 1-0 defeat thanks to Alexander Isak’s early header. Arsenal are now seven points adrift of Premier League leaders Liverpool, with their recent loss extending their winless run in the competition to three games. They’ve been productive in Europe, though. Arteta’s side head into this league phase bout with seve…