Scarlets boast a fearsome home record in the GUINNESS PRO12 but if anyone could afford to be confident of winning there, it’s Ospreys.

Wayne Pivac’s table-topping side have lost just once in the league since March – and just once in their last 22 home clashes in the competition.

However, Ospreys have a good record at Parc y Scarlets, the only Welsh region to have beaten the hosts there since April 2010, a feat they have achieved on three occasions.

Ospreys boss Steve Tandy has named a strong side as they look to make that four, captained by second row Alun Wyn Jones who packs down in front of the imposing trio of Dan Lydiate, Justin Tipuric and James King.

Dan Biggar takes the reins at fly-half, while Ben John makes his 50th Ospreys appearance in the centres, alongside Josh Matavesi.

"Everybody knows that Boxing Day will be a big occasion with a full house, with all the rivalry and atmosphere that goes with a derby match,” said Tandy.

“That's fantastic for the supporters but we can't get caught up in all that. We have to be professional in everything we do.

"We know how important this match is but it's not going to define our season one way or the other.

“We have to ensure that we are switched on throughout this period and do what we've got to do.”

Ospreys have won their last three GUINNESS PRO12 encounters but are without an away win outside of Italy in any tournament since May.

Scarlets, meanwhile, ended a five-game losing streak against Ospreys with a 22-10 home win last season and Pivac will be hoping to repeat that outcome this weekend.

The head coach is able to call on captain Ken Owens, John Barclay and Aaron Shingler, who each return to action.

Aled Davies is named at scrum-half in the only change to the backline from the side that narrowly lost to Glasgow Warriors in Europe last weekend, with Gareth Davies moving to the replacements bench.

Four changes to the pack see Owens, Shingler and Barclay replace Emyr Phillips, Maselino Paulino and Jack Condy, with Lewis Rawlins moving from the back to second row.

"This is a very different proposition for us and a game that we're all looking forward to,” said Pivac.

"Ospreys have been playing very well and playing some good rugby. They're going to be a big threat to us, they have some class players.

“What we won't be doing, and haven't done in our preparation, is take for granted the league standings.

“We're prepared for a dog fight come the end of the season but we want to, give ourselves the best opportunity to push for the play off positions come the end of the season.”

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At Parc y Scarlets 2.05pm Live on BBC Wales
Referee: Nigel Owens (WRU, 129th competition game)
Assistant Referees: Leighton Hodges, Wayne Davies (both WRU)
Citing Commissioner: Aurwel Morgan (WRU)
TMO: Jon Mason (WRU)