Ding Junhui crumbled from leading 9-6 to lose 10-9 to Ryan Day at the World Championship, becoming the seventh seed to exit the tournament.
China's big hope for world title glory trailed 5-4 overnight and fell a further frame behind immediately, before Ding reeled off five in a row to lead 9-6.
Day battled back superbly to force a deciding frame, but the 32-year-old from Bridgend seemed to have thrown away all his good work with one shot, taking on a long pot but missing it by a margin and scattering the reds.
That left Ding a golden chance to make a match-winning break but the Sheffield-based 25-year-old missed a red with the rest after reaching 48. It was a battle of nerves and Ding's had failed him.
Day, the world number 35, was quickly out of his seat and and a superb break of 64 gave him the match.
