Newport Gwent Dragons 5-16 Cardiff Blues
Youngster Rhys Patchell kicked 11 points to help the Blues come out on top 16-5 in a hard-fought contest against the Dragons.
The first half was a scrappy affair with countless mistakes from both sides at the set piece and the breakdown and the kickers missing with several penalty attempts as well.
19-year-old fly-half Patchell finally put the first points on the board with a penalty for the visitors just a few minutes before half-time but that sparked the Dragons into action.
And, after a number of strong runs from the forwards, Steffan Jones spotted a gap in the defence and darted over to give them a slender 5-3 lead at the break.
Prop Nathan Trevett was sinbinned for the Blues early in the second half but the hosts could not take advantage of the extra man and, in fact, it was the Cardiff outfit that had the better of that 10-minute period.
Moments after Jamie Roberts had come on to make his return after six months out with a knee injury, his Welsh international colleague Alex Cuthbert seized upon a handling error from the Dragons and streaked away to score.
The impressive Patchell converted the try to give the visitors a five-point advantage and that is the way the score stayed until the final five minutes as both sides again struggled to get any momentum in a very stop-start match.
Patchell successfully slotted over two penalties late on to ensure that the Blues take the bragging rights from this Welsh derby and deny the Dragons a losing bonus point but it is not a match that will live long in the memory for many people.