“‘It’s a different kind of cold,’ Graham Potter says as darkness spreads across Östersund and the temperature plummets to -20C. The inspirational manager of Östersund, who will reach the next stage of an incredible story when they host Arsenal in the first leg of their Europa League tie on Thursday, laughs when I say it’s hard to believe. I’ve felt colder on a wet February afternoon in Birmingham, not far from his old home in Solihull, than I do in this small town in remote northern Sweden. …” Guardian