Zhang Anda shocked world number three Zhao Xintong with a thrilling 6-5 victory by potting a respotted black ball in round one of the China Open.
Zhang, who was down 3-0 in frames, fought back to eventually lead 5-4.
However, last year’s world champion Zhao forced a deciding frame that ended in dramatic fashion.
Zhang, ranked 19th in the world, was in control at 57-0 up, but Zhao fought back to lead with both players on the black.
The black was eventually potted by Zhang to force a respot – used as a tie-breaker when a frame ends with the scores level – with the 34-year-old prevailing.
He will now face England’s Chris Wakelin.
World number five John Higgins also lost in the first round after he was defeated 6-4 by 2015 world champion Stuart Bingham.