All you need to know
What time is kick-off tonight? The match at Cardiff City Stadium gets underway at 7:45pm on Friday, November 16.
Is it on TV? Yes, the game will be screened live on Sky Sports Football from 7pm. It will also be shown live on S4C, with coverage getting underway at 7:25pm, 20 minutes before kick-off.
Alternatively, you can follow updates on our live match blog which will be on our Football page from around 5pm on matchday.
What is the latest team news? Wales are sweating on the fitness of talisman Gareth Bale who limped off the pitch following Real Madrid’s 4-2 win over Celta Vigo last weekend.
Bale missed his country’s last two games against Republic of Ireland and Spain due to injury but will hope to return to action against the Danes.
Elsewhere, Ryan Giggs will be without defenders Neil Taylor and Chris Mepham who have both withdrawn from the squad due to injury.
As for the visitors, they will be without captain Simon Kjaer who is absent due to a hamstring injury. Likely line-ups Wales: Hennessey; Roberts, Williams, Chester, Dummett; Allen, Smith; Lawrence, Ramsey, Wilson; Bale. Denmark: Schmeichel; Dalsgaard, Christensen, Zanka Jorgensen, Larsen; Schone, Delaney; Poulsen, Eriksen, Sisto; Jorgensen.
What are the latest betting odds? (Odds courtesy of Sky Bet, correct at time of publishing) Wales win 7/4 Draw 19/10 Denmark win 9/5
Who is the referee? Slovakian Ivan Kruzliak will take charge of proceedings at Cardiff City Stadium.
How does the group work? Given that there are only three teams in Wales’ group - as is the case with each of the four pots in Leagues A and B - each position has differing rewards.
The winner of the group will gain promotion into League A for the next Nations League in 2020 after the Euros.
But crucially, the country to finish in first place will get the chance to secure a place at Euro 2020 via the play-offs (if they don’t qualify through the regular format).
Whoever finishes second in the table will remain in League B next time around.
And as for the side that finishes third, they will be relegated into League C for the next edition of the Nations League.
How the group stands