Nicolai Jorgensen and Martin Braithwaite give Denmark 2-0 lead
Gareth Bale scores late goal for Wales
Denmark promoted to Group A of the Nations League
Wales remain in Group B as Republic of Ireland are relegated
Wales v Denmark (19:45 GMT)
Dafydd Pritchard
BBC Sport Wales at the Cardiff City Stadium
It's a sell-out at Cardiff City Stadium this evening and the crowd has just been treated to a light show to accompany Wales' pre-match favourite song, Kernkraft 400 by Zombie Nation.
It's like being in a massive night club. Without the sticky floors.
Wales and Liverpool legend Ian Rush says Aaron Ramsey will be looking to impress tonight.
"We know what Aaron can do, and I think he'll have a point to prove.
"He's not playing regular for Arsenal, his contract is up at the end of the season, so he's on show tonight, not just in England but in Europe.
"Hopefully he can put on a good show.
"If them two (Ramsey and Gareth Bale) can turn up, I'm pretty certain we can get the result we need."
Image source, Huw Evans Picture AgencyDenmark midfielder Christian Eriksen says they're treating tonight's game "like a final".
Victory for Wales will guarantee them a first place finish in Group B4 and a Euro 2020 play-off game should they not qualify automatically.
A draw would give Denmark the chance to top the group when they face Republic of Ireland three days later.
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Danny Gabbidon
Former Wales defender on BBC Radio 5 Live
The key to everything is results and if you look at Ryan Giggs’ record so far with this young Welsh team, when they’ve come up against a decent outfit they’ve yet to put in a good performance and win a game.
The Spain game last month didn’t go down too well, Uruguay in the China Cup they didn’t perform well and Denmark away, they lost there.
It’s really important tonight that they get the result and put in a big performance against a top nation.
The last time the two sides met in the Nations League in September, Denmark were 2-0 winners thanks to goals from Christian Eriksen.
Image source, GettyWales v Denmark (19:45 GMT)
Dafydd Pritchard
BBC Sport Wales at Cardiff City Stadium
The Nations League may seem a complex competition – and, in truth, it is – but tonight's match between Wales and Denmark is a straightforward shootout to decide who will win Group B4.
The team which finishes top of the group will be promoted to the top tier of the Nations League, as well as being guaranteed a play-off to qualify for Euro 2020, should they fail to reach the tournament during the regular qualifying process.
For Wales to win the group, they need victory at Cardiff City Stadium in their fourth and final match of their inaugural campaign.
Denmark, meanwhile, could triumph with a draw, provided they beat the Republic of Ireland at home on Monday.
This is the kind of scenario Uefa had hoped for when European football’s governing body devised the Nations League, which was designed in part to replace the many friendly matches in the international calendar – considered by many to be meaningless.
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Victory against Denmark would guarantee a first-place finish and secure promotion to League A, where Wales would face some of Europe's most powerful national sides.
Promotion would also secure a Euro 2020 play-off game, should they not qualify for that tournament automatically.
‘Incentives’ for Wales to win group
Denmark goalkeeper Kasper Schmeichel has mixed emotions about returning to Cardiff City Stadium tonight.
He was in the Leicester City side who played Cardiff City in an emotional match on 3 November.
It was their first game following the death of their owner in a helicopter crash.
Emotional Leicester team observe silence
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Captain Ashley Williams says he'll be "disappointed" if Wales don't top the group tonight.
Two world-class players, but which is the most important to their national side?
Tweet us using the hashtag #bbcfootball
Image source, Getty ImagesWales v Denmark (19:45 GMT)
Dafydd Pritchard
BBC Sport Wales at Cardiff City Stadium
Wales manager Ryan Giggs makes three changes from last month’s 1-0 Nations League win in the Republic of Ireland. Real Madrid forward Gareth Bale is back after injury, while Aaron Ramsey returns after the birth of his twins and there is a first start for Newcastle left-back Paul Dummett. They come in for Matt Smith, Harry Wilson and the suspended Ben Davies.
Wales XI: Hennessey; C. Roberts, Williams, Chester, Dummett; Allen, Ramsey; Brooks, Bale, Lawrence; T. Roberts.
Denmark manager Age Hareide makes eight changes from their 2-0 friendly victory over Austria in October, with the headline news being the return from injury for their star man, Tottenham midfielder Christian Eriksen. Captain and centre-back Simon Kjaer is out injured, while Middlesbrough’s Martin Braithwaite is recalled in place of Pione Sisto.
Denmark XI: Schmeichel; Dalsgaard, Christensen, Zanka Jorgensen, Larsen; Schone, Delaney; Poulsen, Eriksen, Braithwaite; N Jorgensen.
Wales' talisman had been a doubt this week after picking up an ankle injury with Real Madrid, but manager Ryan Giggs says he's "fine to play".
Image source, Huw Evans Picture AgencyHere's how both teams will line up
Image source, BBC Sport
Image source, BBC SportJoin us for all the build up, action and reaction from the Nations League game between Wales and Denmark
KO at Cardiff City Stadium is 19:45
Image source, BBC Sport