It may be the last time football fans get a chance to see the 40-year-old Cristiano Ronaldo perform on Danish soil, and many Danes are going to great lengths to secure a ticket for the match.
However, the massive demand for tickets also creates a potentially lucrative environment for ticket fraud - and the Danish FA is indeed being contacted by lots of people who have fallen victim of fraud.
"We know how frustrating it is to end up being cheated, and we have a lot of understanding for the fans who fall victim to fraud.
"Our ticket team not only offers information and guidance, but is also ready to help provide information to report cases to the police and ensure that no one feels alone in the fight against ticket fraud," said Erik Brogger, CEO of the Danish FA, to TV2 Sport.
It is especially on social media that lots of false tickets are advertised at favourable prices, which attracts many football fans. Often people are victims of fake/non-existent tickets being sold several times.
The Facebook group 'Danes Away', which is a forum for Danish football fans with around 38,000 members, has received inquiries to a much greater extent than before from people who have either been cheated - or suspect that they have been cheated - by people wishing to sell tickets in other Facebook groups.