SWALEC League Division Two East leaders Tredegar were given a second-half scare at Ynysybwl.
Tries from flanker David Ford, full-back Robert Smith and winger Daffyd James saw Tredegar build up a comfortable 22-7 before the All Whites rallied to bring the score back to 22-18.
A late penalty from Tredegar centre Greg Jones stopped the tide and saw the visitors emerge 25-18 winners.
Second placed Bedlinog were 22-15 winners at Rhydyfelin, while Mountain Ash crept past Llantrisant 10-6 in the clash between third and fourth.
Scrum-half Merion Thomas scored the game's only try for the Black and Ambers.
With Division Three East leaders Garndiffaith not playing, Pill Harriers moved level on points with the leaders after a five-try win at Nelson.
A pair of tries from Craig Lloyd, plus one each from Mark Wheeler, Louis Culverwell and Mark Thorogood saw Harriers pick up a bonus point which means they trail Garndiffaith on numbers of wins recorded.
Third place Croesyceiliog came back from 20-8 down on 50 minutes to win 28-20 at Rhymney. Matt Entwhistle conversion from his second try five minutes from the end saw the Croesyceiliog s take the lead, with a fourth try from Ieuan Wakefield earning the Cockerels a bonus point, denying Rhymney one in the process.
Llandaff remain top of Division Four East after a narrow win at Rhiwbina. The scores were locked at 13-13 with ten minutes remaining when full-back Nathan Rees kicked a penalty to give Llandaff the lead, which they refused to relinquish.
Nantyglo in second crossed ten times in a rampant 62-5 win over bottom club Pontllanfraith. There was two tries each for Richard Jones, Anthony Williams, Jamie Davies and Chris Williams for the Monmouthshire club.
The top two in Division Five East going into the afternoon, Blaenavon and Abercarn, met at the Recreation Ground, with visitors Abercarn running out 31-12 winners.
Tries from Matthew Jackson, Jack Davies, Nicky Lloyd and Jason Evans saw Abercarn pick up a bonus point, which sees them go ten points clear at the top of the table.Blaenavon's defeat sees them fall to fifth, behind Caldicot, Talywain and Oakdale, who all recorded away wins.
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.
Meet Aberdare coach Luke Thomas whose #FABXV nomination goes to super volunteer Daz with a whopping 10 things he does for the club each week, all except the ironing! You can also join in the search for Welsh rugby's greatest volunteers, by sending your nomination via twitter to @WRU_Community using the hashtag #FABXV
SSE Swalec Cup kings Pontypridd travelled to Swansea, fully expecting a return to their second home but Llandovery had other ideas as they also sought victory in the semi-final to earn the right to play the final at Principality Stadium