“To be continued,” Loris Karius wrote prophetically on his Instagram account on January 19. There was an emoji of a piece of paper and a pen accompanying the words. Karius had just signed an extension to the short-term deal that he had agreed with Newcastle United in September. Even in his most lucid moments of hope, the goalkeeper cannot have envisaged the latest twist in his life. On Saturday night it became apparent that he would be in Newcastle’s starting XI for their first cup final since 1999.