With a waterlogged pitch forcing the leaders Pontypridd's game against Neath to be called off, second placed Newport looked to draw level at the top of the Principality Premiership last Saturday.
However a bonus point win eluded them as they grabbed a hard-fought win over Llanelli. Newport tries from Dai Patterson and Adam Frampton were cancelled out by a Jason Howells try for Llanelli and 9 points from the boot of Luke Richards, leaving Newport trailing 14-13 at the break. The game turned after the break, as Newport scored another try through Dai Jones to seal the win, 23-17.
Fourth placed Swansea were looking for a convincing win against lowly Ebbw Vale, but with a home crowd behind them and kicker Nick Wakeley in sparkling form, Vale were still in touch, 7-6 down at half time. Swansea never got going in the second period and Oliver Halford punished them, crossing over to lead his team to a 14-7 win.
Lowly Pontypool put up a stiff resistance at Memorial Park, where Glamorgan Wanderers struggled to overcome the league's bottom side. The teams went in level at 10-10 at the interval, but Lee Highgate scored a late try and the Wanderers held on for the victory.
The basement battle at Pandy Park was won convincingly by Cross Keys against Carmarthen. The boot of Gareth David kept the scoreboard ticking over for Cross Keys and Robert Nash scored the try as the home side triumphed, 25-8.
In the other matches, the weather was victorious; Cardiff's mid-table clash with Aberavon fell foul of the rain, as did the match between Bedwas and Llandovery.
Wales reached their first semi-final since 2013 in the opening round of this season's HSBC World Rugby Sevens Series in Dubai. WRU TV's Graeme Gillespie recaps on what proved to be an eventful tournament
Wales and Ospreys back row James King, who came through the North Wales age grade system, nominated North Wales Regional Community Rugby Manager Marc Roberts, in the WRU's 'Diolch' initiative where squad players thanked those who played a part in their rise to the top.
Beating Merthyr has boosted Carmarthen Quins hopes of reaching a top eight spot in the Principality Premiership. Quins captain Haydn Pugh is delighted with his team's progress and is determined that everyone from the Under 6s through to the senior team, enjoys the ride.
When the Wales squad were asked to nominate individuals who played a big part in their early playing days, Wales and Dragons full back and wing Hallam Amos thought of his former Monmouth School rugby coach John Bevan.
Sam Cross and Luke Treharne have been named as co-captains of the Wales Sevens side as head coach Gareth Williams names his 12-man squad to play in the first leg of the HSBC World Series in Dubai next weekend.
Bedwas head coach Steve Law and players Nicky Griffiths and Alun Rees extol the virtues of the close knit club as they prepare to host third place RGC 1404 - who are one place head of them on the Principality Premiership points table - on Saturday.
Many of the Wales squad have said Diolch (thank you) to someone who played an important part in their early playing days by nominating them to be invited to the Wales v South Africa match. One person, Gowerton Comprehensive geography teacher Mr Dean Mason was nominated by two of his former pupils, Dan Biggar and Sam Davies.
The second WRU disability rugby pilot has been delivered, this time in Caerphilly schools, culminating in a festival at the Caerphilly Centre of Sporting Excellence, Ystrad Mynach tomorrow. Plans are in place to set up a Disability Rugby Club in Newbridge to provide long-term playing opportunities.
WRU TV: Hear from inside the Wales camp as Neil Jenkins discusses this weekend's clash with South Africa and how the squad are looking to put in a strong performance to round of the 2016 Under Armour Series