Wales could be about to make footballing history over the next two games.
Wales need to come out on top against the Republic of Ireland across the two games to ensure qualification for their first major tournament.
A record number of tickets have been sold for the first leg, at Cardiff City Stadium on Friday evening.
Rhian Wilkinson's side will be hoping the crowd of more than 16,000 will help them secure a victory to put them in the best possible situation for the second leg in Dublin on 3 December.
The prize? A spot at Euro 2025.
[Update 29/11] Wales and Republic of Ireland settled for a 1-1 draw in the Welsh capital that leaves both nations still dreaming of a place at Euro 2025.
The two nations will now meet in Dublin at the Aviva Stadium on Tuesday, 3 December with all still to play for after a cagey and absorbing contest in Cardiff.