Xiao in action in the game.
Xiao Guodong won a match at the Crucible for the first time by beating Ryan Day 10-4 in the opening round of the Betfred World Championship.
Qualifier Xiao outplayed 16th seed Day to set up a second round meeting with world number one Mark Selby, which starts on Saturday evening. Chinese cueman Xiao joins countrymen Ding Junhui and Liang Wenbo, as well as Hong Kong's Marco Fu, in a strong Asian contingent in the last 16 in Sheffield.
World number 44 Xiao's only previous appearance at the Crucible came in 2014 when he lost 10-8 to Ali Carter, but this time he was on the front foot immediately as he raced into a 4-0 lead over Day and finished the first session 6-3 ahead.
And the 28-year-old showed no signs of nerves in the closing stages as breaks of 67 and 78 helped him extend his lead to 9-3. Day, the only Welshman in the field, pulled one back with a run of 98 to at least reach the interval, but there was to be no fight back as Xiao closed out victory in frame 14 with 41 and 38.
Meanwhile, Rory McLeod registered a massive shock in the first round by beating second seed Judd Trump 10-8.
World number 54 McLeod's victory over a player 52 places above him in the rankings stands alongside the biggest first round upsets in Crucible history, including Tony Knowles' defeat of Steve Davis in 1982 and Michael's Wasley's win over Ding Junhui in 2014.