Chris Davidson was the star of the night as holders Knowle & Dorridge became the only top-flight team to qualify for the last four of this year's rejigged Birmingham Midshires League Twenty20 Challenge Cup.
The K&D leg-spinner destroyed Division Two side Studley with a burst of five wickets in 20 balls.
Chasing K&D's 162 for five, Davidson took five for four in 3.2 overs as Studley were dismissed for only 70.
K&D's opponents in the semi-finals are Attock, one of two Division Two teams left in, thanks to a three-wicket win at Water Orton.
Safraz Ali took three for 25, before seeing his side home with an unbeaten 26, with seven balls to spare.
In the other half of the draw, Cannock pulled off a 16-run win at home to Himley, thanks to fine efforts from David Powles (50) and Richard Hewitt (43).
But the Division Two side must travel for the semi-final in 13 days' time to face Smethwick, who pulled off a six-wicket win with nine balls to spare over visitors Kidderminster.