Cardiff and Llanelli played host to derbies on 26 December and the action will be in Newport and Bridgend on New Year’s Day.
The Arms Park was packed before Christmas to see Scarlets edge out the hosts, and this time a packed house saw the Blue and Blacks sneak victory.
A sold-out figure of 12,125 tickets issued was announced by Cardiff, with Dragons head coach Filo Tiatia lauding the atmosphere.
“The crowd was amazing, for Cardiff and the Dragons,” said Tiatia, an Ospreys legend from his playing days. “It became a singing contest at the end.
“It was pleasing to see where the game is at with local derbies and fans coming out to support their teams.
“That’s what we want for derbies – that they are competitive, grounds are sold out and the game is growing. It’s all around the tribalism of the regions.”
There were more than 12,000 at Parc y Scarlets as well, with victorious Ospreys head coach Jones hoping there are more occasions like this as the WRU looks to cut a men’s professional side.
“You could tell it was a west Wales derby and long may they continue,” said Jones.
“These occasions are massive. Just at the end of the game, to see your players and coaches going over to meet their families over in the terrace over the far side.
“With so many of them and fans turning up when they could be doing all sorts at this time of the year, but they choose to come down and support their team.
“It is amazing. We talked about the emotional side of the game in the derby and how you have to use the emotion.
“I thought the boys used the emotion incredibly well and the Scarlets did the same. I thought their care for their shirt was equally good.”