Arsene Wenger has been here before. His team has moved from behind, they have closed a gap. Once it would be to win the title, more recently to clinch a top four finish. His faith is strong but unusually this year there is a trace of doubt in his language which betrays his concern that Arsenal’s unbroken 15-year Champions League status is under its greatest threat. 'Last season we came from further behind and finished third but Chelsea are a bit away from us,' said Wenger. 'The game we lost on Sunday had difficult mathematical consequences.'