Pontypridd winger Owen Williams goes over in the corner against Cardiff.
Llanelli threw away a massive lead for the second weekend in a row before crashing to a 28-26 home defeat at the hands of Neath in the Principality Premiership.
The previous weekend the west Wales side had been 29 points clear at Aberavon before ending with only a share of the pints in a 32-32 draw.
But this time they squandered a 21 point advantage shortly after the break at Parc y Scarlets before not only conceding victory to Neath, but also a try bonus.
The yellow card received by lock Adam Powell 15 minutes into the second half proved crucial and the visitors ran in two tries before striking through Kevin James for the vital, match winning fourth.
The five point raid in the west by Neath means they move up the table into second, just three points behind league leaders Pontypridd. Paul John's Sardis Road outfit knew they had to win against Cardiff to stay on top and the boot of outside half Dean Gunter did the damage for them.
He kicked four penalties in the first half and another after the break to secure victory. Wing Owen Williams grabbed the visitor's only try, while Rhys Shellard and Matthew Veater crossed for the home side.
Both teams had a player sent to the sin bin and the game ended with passive scrums after Cardiff suffered front row injuries.
Swansea sailed into a 20-0 interval lead at Glamorgan Wanderers before eventually grabbing a try bonus in a 28-12 triumph. With a game in hand on the Pontypridd and Neath, they could climb back to the top when they make up their fixtures.
David Watts, Leigh Bevan, Luke Jones and Rhodri Wells crossed for the visitors and James Dixon kicked two penalties and a conversion. The home side nabbed two tries in the final five minutes to add some respectability to the scoreline, Charlie Johnson and Dan Fish getting the scores.
Premiership new boys Carmarthen Quins took a giant step away from the relegation zone as they ran winless Pontypool ragged to pick up a bonus point in a 40-10 away win. Scarlets wing Darren Daniel enjoyed his visit to Pontypool Park as he zipped over for a hat trick of tries.
Richard Carter and Ellis Lloyd scored the other two tries for the visitors and Gareth Cull added 15 points with the boot. Steve Taylor scored Pontypool's sole try and, to make matters worse, they had No 8 Sam Pailor sent off for punching.
Ebbw Vale must have been thinking about notching a second win when they went into the interval at home against Llandovery 16-10 in front. But in the end the Steelmen fell to a disappointing 24-22. Gareth Bowen kicked 17 points for the home side, but two tries from Wales Sevens wing Ifan Evans, and a third from centre Joe Ajuna, secured the points for the visitors.
A late Dan Davies try earned Aberavon a bonus point at home against Newport, but they conceded three in a 27-20 defeat. Cross Keys had tries from Rob Nash and Will Johnson to thank for their 20-13 home triumph over Bedwas.
The Half a Game initiative is currently sweeping across Wales and proving a major success. The scheme aims to give every young player at least half a game every weekend. WRU TV recently visited a festival in Narberth where clubs have fully embraced the initiative.
Both Bargoed and Swansea were seeking their first win of the Principality Premiership season this afternoon. It proved a fruitful day for the hosts - not only did they win, but Bargoed claimed a try bonus point.
Cardiff managed to keep their unbeaten record at home intact, but only just as Bridgend made them work extremely hard before the Blue and Blacks secured a hard fought Principality Premiership win at the BT Sport Arms Park last night.
Former Wales back row Andy Powell gives a guided tour of The Wern, home of Merthyr RFC, who are determined to prove a lot of people wrong and make their mark in their first season in the Principality Premiership.
Wales Sevens head coach Gareth Williams looks back on the Rio Sevens success where he helped GB win silver. He believes the successful campaign is a huge boost to his Welsh squad as they prepare for another World Series, as WRU TV's Graeme Gillespie discovers
British and Irish Lions head coach Warren Gatland will be heading back home to take on the All Blacks next year where for him, success for 2017 is all about going to New Zealand and winning a Test Series.
Last week all roads led to Eugene Cross Park where defending champions Ebbw Vale hosted this season's launch of the Principality Premiership. WRU TV's Graeme Gillespie was there to capture the thoughts of Damien Hudd, captain of Ebbw Vale, and WRU Head of Performance, Geraint John.
Llandovery made it three in a row when they defeated Aberavon in the final of the National Foster's 7s at BT Sport Cardiff Arms Park on Sunday. On another eventful day of sevens, Newport claimed the Plate and the Dragons won the women's crown
Last week saw Cardiff welcome players from around the world for the 21st Golden Oldies Festival. The tournament features players over 35 years of age, and this year's event saw a select few represent the WRU in a 'friendly' against the Wooden Spoon.
Wales Under 18 captain Callum Bradbury is delighted to have seen his side claim a narrow 18-17 victory against a strong SA Schools 'A' side to end the three-match Under 19 International Series in South Africa on a high note.
The Wales U18 squad spent an emotional day in the drug-riddled townnship of Hout Bay. Hout Bay Warriors President Fred Johannes said the visit was 'the talk of the town' and will dream about the day everyday for the rest of his life.
RGC 1404's new head coach Mark Jones is hoping to build 'something special' in north Wales and is already looking forward to the development region participating in the Principality Premiership for the very first time.