Four time world champion John Higgins was the biggest scalp of the first round of the inaugural International Championship in Chengdu, China.
The Scot, looking to complete a ranking double in China after triumphing in the Shanghai Masters last month, lost 6-3 to home favourite Cao Yupeng.
Higgins was sluggish throughout and despite taking a 2-0 lead with breaks of 71 and 73, Cao fought back spectacularly to take the next five frames.
The world No 3 stayed in the match by winning the next - missing out on a 147 in the process after failing to pot the 11th red - but his 22-year-old opponent held his nerve to wrap up the biggest win of his fledgling career.
Elsewhere, world number one Mark Selby had very few problems in seeing off English compatriot Ali Carter.
Selby knocked in breaks of 63, 51, 50 and 59 to seal his place in the last 16 with a 6-3 win and he will meet either Ricky Walden or Lu Ning, who edged out Barry Pinches 6-5 in a scrappy encounter to reach the first round proper.