Neath stayed top of the Principality Premiership thanks to a narrow 15-14 win over Cardiff at The Gnoll.
Tries from hooker Andy Littlehill and winger Jamie Davies were enough to secure the win with fly-half Dai Langdon adding a conversion and a penalty. For Cardiff, Richard Smith crossed for a try and 18-year-old outside half Richard Patchell kicked three penalties.
There was another close encounter at Carmarthen where the mighty Quins stole victory at the death with a last gasp penalty from replacement Daniel Evans that made it 27-26. The visitors thought they had done enough to win it when full back Adam
Thomas grabbed his second try in the 73rd minute and Simon Humberstone's conversion made it 26-24 in their favour.
But there was one last push from Quins and Evans kept his cool to slot the match winning penalty to add to the earlier good work of full back Craig Everett, Jason Harris and Ricky Richards, who all grabbed tries. Full back Chris Banfield converted all three and also landed a penalty.
Cross Keys also triumphed by a single point in another Principality Premiership thriller that saw the Gwent side overtake Llanelli in the table. Their 13-12 win at Parc y Scarlets was down to the individual brilliance of outside half Steffan Jones, who scored all the visitors' points with a try, conversion and two penalties that gave Keys a 13-0 lead.
Llanelli finally came to life in the second half and crossed for two tries of their own, through replacement Bowdy Davies and flanker Mat Gilbert. But Diggy Bird only kicked one conversion, and his side came up one point short.
Aberavon ensured veteran No 8 Richard Morris had plenty to smile about on the day he became only the third player in the club's history to make 500 appearances. The Wizards romped to a comfortable 40-19 bonus-point win over struggling Newport at the Talbot Athletic Ground.
The home side picked up two penalty tries after the visitors, faced with an imposing performance from the home pack, collapsed scrums. Full back Liam Gadd also touched down, as did outside half Jamie Davies, who added a further 20 points from four conversions and four penalties.
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