Tony O'Shea and Wesley Harms reached the semi-finals of the BDO World Championships with wins over Robbie Green and Darryl Fitton respectively.
O'Shea, who was runner-up in 2009 and 2012, won 5-3 to reach his fourth semi-final in five years.
It sets up a repeat of last year's final four meeting with Harms, whose clinical finishing saw off Fitton 5-2.
Richie George will face Jan Dekker and Paul Jennings plays Scott Waites in Friday's other quarter-finals.
In the women's semi-final, Bolton's Lisa Ashton beat Sharon Prins of the Netherlands 2-0.