Kenfig Hill v Llantwit Fardre at Llanharan (2.30pm)
Maesteg v Loughor at Glynneath (2.30pm)
The Old Parish are just a win away from clinching the league title, but know they are in for a tough task against Loughor on Saturday.
"We haven't played them in the league as yet but they are due at Llynfi Road next Saturday and we finish our league season off at Loughor on 15 May," said Maesteg press officer Dennis Thomas.
"The Plate is a trophy we want to win and we are fully committed to going all the way to the Millennium Stadium on 8 May."
Maesteg are 17 points clear at the top of Division 2 West having losst only once in 18 outings to date this season. Loughor are down in sixth place.
"We still have four games to play but one point should secure the title for us and help to make up for the disappointment of going down by a point last season.
"Our squad is full of ex-Maesteg youth team players and we are hoping to re-establish ourselves both in the cups and league."
Kenfig Hill of Three South West take on Llantwit Fardre of Two East in the other Plate semi-final.
SWALEC BOWL SEMI-FINALS
Abercarn v Pontardawe at Merthyr Tydfil (2.30pm)
Senghenydd v Trebanos at Rhymney (2.30pm)
Abercarn of Four East play Pontardawe of Four South West, while in the other semi-final, Senghenydd of Five South East take on Trebanos of Five South West.