Paul Foster and David Gourlay crash out in Perth
No Scots will feature in the semi-finals of the Scottish International Open after the exit of world number one Paul Foster and David Gourlay.
Foster lost in a tie-break to Welshman Robert Weale and former world champion Gourlay suffered the same fate when beaten be England's Greg Harlow.
Third seed Harlow now faces 11th-seeded Weale in Perth.
Top seed and holder Mervyn King, who beat fellow Englishman Ian Bond, faces English qualifier Robert Paxton.
Paxton continued his fine form as he dominated compatriot and sixth seed Simon Skelton to win 13-8 10-4.
King put in a similarly commanding display as he eased aside the unseeded Bond 10-2 8-4.
However, the two Scots exited in dramatic fashion despite having both won their first sets.
Foster took the first set 9-3 and looked destined for the semi-finals when he scored four at the seventh end to lead 8-7.
Weale, though, replied immediately by scoring three of his own and went on to win the second set 12-8 before showing deadly accuracy to win the tie-break 2-0.
Foster told BBC Two Scotland: "I started off really well and, in the end, I don't think I did much wrong, but all credit to Robert."
Weale put his victory down to a determination not to accept defeat.
"It is all about digging in," he said.
It was a similar story for Harlow against fellow former world champion and eighth seed Gourlay.
The Scot took the opening set 8-3, but Harlow replied by winning the second 10-5 before claiming the tiebreak 2-0.
(Q) Robert Paxton (Eng) bt (6) Simon Skelton (Eng) 13-8 10-4
(11) Robert Weale (Wal) bt (2) Paul Foster (Sco) 3-9 12-8 2-0
(1) Mervyn King (Eng) bt Ian Bond (Eng)
(3) Greg Harlow (Eng) bt (8) David Gourlay (Sco) 3-8 10-5 2-0
(1) Mervyn King (Eng) v (Q) Robert Paxton (Eng)
(3) Greg Harlow (Eng) v (11) Robert Weale (Wal)
Coverage from Dewars Centre in Perth continues on BBC Two, the red button and on the BBC Sport website at the following times:
Friday 11 November 1300-1715
Saturday 12 November 1405-1620