Newbridge were the cup kings after they produced the biggest upset of the fourth round in the SWALEC Cup.
Joe Calzaghe's hometown club gave Bedwas a knockout blow by dumping out the top flight outfit in a 18-15 triumph at Bridge Field.
The Division One East leaders trailed by just two points at half-time after a brace of tries from Lenny Woodard cancelled out scores from Jimmy Norris and Deri Mattravers.
But the match was decided by centre John Hawker's try on the 55th minute, which was the only score of the second half.
Bedwas failed to recover and became the first and only Premiership team to depart the competition at the first hurdle.
There were routine wins for most of their Premiership counterparts, with Swansea picking up the biggest win of the fourth round, hammering Bala 104-3. Ospreys squad member Leigh Bevan crossed four times against the Division One North visitors.
Bridgend saw off local rivals Pencoed 37-6 at Brewery Field by running in six tries while Llandovery went one better in the 45-0 win at Beddau.
Welsh Premiership rivals Aberavon, Newport and Pontypridd also recorded comprehensive victories to ease into the fifth round.
But Pontypool were given a scare at Bonymaen before pulling through 13-5. Pooler went behind on ten minutes through a try from winger Robert Jones before first-half replies from Will Kershaw-Naylor and Calwyn Morgan gave the visitors a narrow 13-5 victory.
There was a dramatic finish in Llanelli, as Felinfoel led Caerphilly deep into injury-time. With the score tied at 31-31, having scored five tries to Caerphilly's four, the Carmarthenshire club looked to be heading through on the try count rule.
But Felinfoel lost their lineout with seconds remaining and outside-half Danny Ellis touched down under the posts to clinch victory for the visitors.
There was just time left for Ellis, a second-half supersub, to kick the conversion before the referee blew up to allow Caerphilly to go through 38-31.
Whenever Bedlinog tackle Penallta a massive fixure is guaranteed but this Sunday there will be even more emphasis placed on the two rivals when they contest the SSE Swalec Plate final at Principality Stadium.
Ahead of their SSE SWALEC Bowl Final clash with Taffs Well at Principality Stadium on Sunday, Burry Port share their #FABXV nomination with WRUTV in the search for Welsh rugby's greatest volunteers. Everyone can get involved by sending nominations via twitter to @WRU_Community using the hashtag #FABXV
Cardiff Blues prop Gethin Jenkins and Ospreys centre Ben John look ahead to the first game at Principality Stadium in Saturday's double header which is promising to be a special occasion for all Welsh fans.
Carmarthen Quins Director of Rugby Ian Jones and committee member Jeff Thomas along with Llandovery chairman Handel Davies look ahead to Sunday's SSE SWALEC Cup showdown where both teams are out to prove 'West is best'
SWALEC ambassador Shane WIlliams is looking forward to Sunday's Finals Day where the Cup, Bowl and Plate offers a great opportunity for players and teams to experience the magic of playing at Principality Stadium
Carmarthen Quins coach Richard Kelly believes it is an exciting time to be part of the Scarlets region as his side take on local rivals Llandovery in the SSE Swalec Cup final on Sunday, as WRU TV's Graeme Gillespie discovers
Scarlets long serving prop Phil John talks to WRU TV's Graeme Gillespie about Judgement Day IV and SSE Swalec Cup finals day. The last time Llandovery were in the cup final in 2007, the Drovers claimed the spoils with Phil playing a major role in the engine room.