Martin Gould won a deciding frame to beat two-time world champion Mark Williams 5-4 in the first round of the German Masters.
The Pinner Potter – in his first match since qualifying for the tournament in December – won the first two frames, including a 70 break in the opener.
Williams, ranked six places above Gould at world number 14, hit back to level going into the interval and then took a 4-3 lead with breaks of 51 and 68.
But Gould rallied and clinched the final two frames, wrapping up victory with the highest break of the match.
He will meet world number 30 Ben Woolaston, a surprise victor over Shaun Murphy, in Thursday’s second round in Berlin.