Neath will be outnumbered ten to one at Stradey Park, when they face Llanelli in the Principality Cup quarter-finals on Saturday (Kick-off 5.30pm).
The Welsh All Blacks have been slow in taking up tickets for the crunch West Wales clash and the crowd scenes are set to be 'all Scarlet'.
Llanelli officials are warning Neath fans in particular to book tickets in advance using the hotline number (0871 871 8088) or face being disappointed on the day.
"The ticket computer tells us Neath fans are staying away from Stradey this weekend," said commercial manager Ross Davies.
"And we only hope they don't all expect to turn up on matchday. Scarlets have been buying ten times the amount of tickets in advance and that can only mean there will be a lot of disappointed Neath fans come kick-off."
Llanelli coach Gareth Jenkins is preparing his side for a Heineken Cup quarter-final clash with Perpignan at Stradey Park the following week, but says this match stands alone in Llanelli's must win list.
"These are one off games and it's winner takes all when you get out there on the pitch," he added.
"It stands on its own as a local derby with a huge prize at stake and we have a huge opportunity to play at the top of our ability and progress in the Principality Cup.
"Neath have beaten us twice already this season and will not be coming here with anything but victory in mind.
"They don't show the same respect to home advantage that other teams do and they won't think twice about beating us in our own backyard.
"Preparation has been a challenge this week, as we have welcomed a host of players back from international duties. But those players have lead the tempo in training and we have been impressed by everyone's attention to detail."
Llanelli: Barry Davies; Garan Evans, Matthew Watkins, Leigh Davies (Captain), Salesi Finau; Stephen Jones, Dwayne Peel; Phil John, Aled Gravelle (cor.), Martyn Madden, Vernon Cooper, Chris Wyatt, Dafydd Jones, Simon Easterby, Scott Quinnell
Replacements: Iestyn Thomas, John Davies, Jamie Cudmore, Ian Boobyer, Guy Easterby, Gareth Bowen, Tal Selley
Welsh players and management joined Deputy Minister for Sport Ken Skates at the Pierhead Building, Cardiff Bay earlier this week to reveal the Union's pioneering school-club hub initiative has been so successful the project will now almost double the scale of the original project.
The Scarlets, Newport Gwent Dragons, Cardiff Blues and the Ospreys look ahead to Judgement Day III which sees the Blues take on the Ospreys (2.30) and the Dragons tackle the Scarlets (4.45pm) at the Millennium Stadium tomorrow afternoon.
Ystradgynlais and Ynysddu played out a titanic struggle at Taffs Well in the SSE SWALEC Bowl semi-final. At the end of the game neither team could be separated after a 15-15 stalemate but Ystradgynlais go through on try count.
Blues strike first in JD III battle - Newport Gwent Dragons lock Andrew Coombs, WRU referee Dylan Llyr Jones and Cardiff Blues hooker Matthew Rees decide dressing room allocations for Judgement Day III
Wales Under 18 captain Calum Haggett has received a conditional offer to read Biomedical Science at St Anne's College, Oxford. WRU chairman Gareth Davies went to meet Calum and Coleg y Cymoedd Principal Judith Evans to wish him luck in his exams and pass on some of his personal experience.
Dodgy tattoos, carthorses, Avatar and soft chins are revealed by Wales Sevens players Tom Williams and Sam Cross as they profile the Wales Sevens squad taking part in Hong Kong this weekend in the latest round of the HSBC Sevens World Series.