Ronnie O'Sullivan's hopes of winning his fifth Welsh Open title are over after suffering a 4-3 defeat to Ricky Walden in round four on Thursday night.
Walden produced a superb break of 136 to move into a 3-1 lead only for the Rocket, who beat Ding Junhui 4-2 during the morning session at the Celtic Manor Resort in Newport, to bounce back with breaks of 88 and 85 and force a deciding frame.
However, Walden held his nerve brilliantly with a run of 83 that included a stunning pot on the pink to book his place in the quarter-finals, where he will meet Joe Perry.
Judd Trump advanced with a 4-1 win over Jimmy Robertson as he began to rediscover some form, taking the final frame with a break of 100.
Ali Carter beat Scott Donaldson 4-2, Zhang Ada saw off Matthew Stevens 4-2, and Hossein Vafaei edged out Ryan Day 4-3.
Related snooker links
Welsh Open draw and results
Fast Results
Scores
Racecards 
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