Three-time champion Martin Adams was the major casualty at the BDO World Darts tournament on Friday night as he suffered a 5-2 quarter-final defeat to Jan Dekker.
Dekker took a 3-0 lead but Adams responded by winning the next two, including a check-out of a 161, to put the pressure on.
It told as Adams missed five match darts, but he eventually took the seventh set to reach his second semi-final.
He will meet Alan Norris, who won a memorable encounter with James Wilson 5-2 later in the evening.
Norris and Wilson had been tied at 2-2 but Norris turned it on after the interval and won six straight legs on his way to victory.