Arteta is entrusting Tierney to be the creative one but it's not working at the moment. I really think Arteta needs to start trusting Xhaka by giving him the creative freedom to go forward. Xhaka is more creative than Tierney and has talents that are being wasted by instructing him to stay back at all times. When Tierney's runs are not working, let Xhaka roam and get Tierney to cover. This is my opinion. Xhaka has a mean long shot that should be utilised against low blocks. Partey too.