Manager Mikel Arteta explained that Arsenal's usual composure was absent during their League Cup semi final exit against Newcastle United who secured a 4-0 aggregate victory on Wednesday. Mikel Arteta claimed his team stood ready to reverse their 2-0 first leg deficit but their momentum diminished after Martin Odegaard missed a fantastic opening. Jacob Murphy converted a rebound to give Arsenal a significant challenge to overcome just two minutes after Odegaard's missed chance as Alexander Isak's shot struck the post. Arteta told reporters