The Drovers forced their way into the last four with a commanding display from Cerith Rees who guided his side to a 23-13 victory over Tonmawr while Aberavon fought off a late challenge from Cardiff to win 19-17 at the Arms Park.
Pontypridd v Swansea - 6.30pm, Cardiff
Llandovery v Aberavon - 2.30pm, Carmarthen
Gorseinon v Ammanford - 2.30pm, Glynneath
Tondu v Glynneath - 2.30pm, Morriston
Maesteg Quins v Porth Quins - 2.30pm, Taffs Well
Vardre v Senghenydd - 2.30pm, Maesteg