Andriy Yarmolenko climbed off the bench to sink Sevilla as West Ham prolonged their European adventure with a dramatic extra-time win.The Hammers, debutants in the knockout stage of the Europa League, stunned one of the tournament favourites and six-time winners at a raucous London Stadium.Trailing 1-0 from the first leg, Tomas Soucek headed West Ham level in the first half.And on a genuine European glory night, reminiscent of Upton Park in its heyday, Yarmolenko fired the Hammers to a 2-1 aggregate victory and into a historic quarter-final.West Ham, who looked comfortable at this level throughout the group stage, went straight...