Ospreys fly-half Dan Biggar says their Boxing Day win over Scarlets was thanks to players being willing to "put their bodies on the line".
The Swansea-based region emerged 10-6 winners at Parc Y Scarlets in the first of two back-to-back encounters with their nearest rivals.
"It wasn't free-flowing rugby out there, but that's what you expect from a derby away from home," he said.
The teams meet again in Swansea on Friday, 3 January.
Sporting a cut eye after an accidental clash of heads, Biggar commented: "It was a bruising encounter."
And he added: "There were some big ball carriers out there and it was was just put your body on the line stuff - this little scratch will heal itself and we can enjoy our Christmas a little bit more now that we've got a win."
The victory - clinched late on when Wales and Lions lock Ian Evans came off the bench to score a try - lifted the Ospreys into second place in the Pro 12 table.
Ospreys had trailed 6-0 at the interval of a fiercely-contested encounter, but didn't concede a point after the interval when they dominated possession, but struggled to penetrate the home defence.
"First things first we didn't play overly well," admitted Biggar.
"It's never easy coming down here they always bring an intensity which we struggled to adapt to early doors.
"We didn't start overly well and it's just credit to the boys we managed to hang on in there and it was a great effort to get the try at the end.
"We kept going and going but I think the most pleasing thing was when we needed to be accurate we were - when it mattered the forwards were outstanding and that try at the end was just perfect."