The top four seeds have all progressed to the semi-finals of the Mamut English Open Squash Championships in Sheffield.
Scotland's John White was the last to clinch his place, the third seed overcoming a hip injury to defeat Canadian Shahier Razik over four games.
White faces Nick Matthew on Monday after the second seed beat English compatriot Jonathan Kemp.
The other semi-final is an all-English affair, with top seed James Willstrop facing Peter Barker.
Barker eased through against fellow Englishman Chris Ryder 11-5 11-3 11-1.
Willstrop enjoyed an 11-6 11-5 9-11 11-8 win over Frenchman Renan Lavigne.
White defeated Razik 11-2 11-8 12-14 11-9, while Matthew progressed in three straight games, 11-9 11-7 11-4 against Kemp.