Mark Allen missed a simple black to book his place in his first World Snooker Championship final before falling 17-16 to Wu Yize in one of the most dramatic last-four finishes in Crucible history. The 40-year-old Antrim man had the match at his mercy when he got on top of an error-strewn 32nd frame and required just the black off its spot to wrap up a 17-15 win. But incredibly Allen rattled the pocket, leaving Wu an unexpected chance to haul level at 16-16 and set up a pressure-filled decider in front of a raucous Sheffield crowd. Allen shut out his nightmare brilliantly, easing into a 47-point lead before an unlucky split on the reds left him out of position and ultimately let in the nerveless 22-year-old to cue up a brilliant 71 clearance to win 17-16 and set up a final against Shaun Murphy . Shell-shocked Allen told BBC Sport: “You don’t deserve to be in a world final if you’re missing balls like that. It was just pure pressure, to be honest.…