Ding Junhui was stunned by Kyre Wilson in the quarter-finals of the Shanghai Masters.
Ding started off from 2-0 behind but saved the match points to come up to 4-4 to force Wilson into the deciding frame.
The two were tangled up at the brown-four when Ding was leading 48-38. Wilson bagged the ball first and cleared the table to win it 54-61.
Wilson will face Mark Allen in the semi-finals.
Other names that join them in the semi-finals,
Judd Trump swept past Mark Williams 5-1.
Stuart Bingham edged Martin Gould 5-4.