Denmark fell to a 3-0 friendly defeat in Slovakia after being forced to select a starting XI of futsal and Danish lower league players.
The visitors were left with a severely weakened team after a dispute between the Danish Football Association and their players over commercial image rights.
The likes of Christian Eriksen, Andreas Christensen and Kasper Schmeichel, among others, are refusing to sign a new agreement with the national team.
Hopes that the situation could be resolved in time for Denmark's home Nations League clash with Wales on Sunday are now in doubt, which would hand Ryan Giggs' team a huge competitive advantage in the three-team group that also features the Republic of Ireland.
Full-time manager Age Hareide was also absent, and temporarily replaced by John Jensen, who revealed he previously knew nothing about those in his squad.
Among those in Denmark's line-up were Christian Offenberg, a salesman, and student Simon Vollesen, as their lone striker and right-back respectively.
If the circumstances had tempted Slovakia coach Jan Kozak to experiment with his team he ultimately resisted, and instead ensured Marek Hamsik, Vladimir Weiss and captain Martin Skrtel played from kick-off.
He was rewarded with a goal in the 11th minute through Adam Nemec when, following a confident start, Juraj Kucka sent a cross into the penalty area and, from close range, the striker headed beyond goalkeeper Christoffer Haagh.
Hamsik had already threatened by then and did so again shortly before Albert Rusnak doubled the hosts' lead, when Kucka found him in the area in the 36th minute and he sent a right-footed finish into the bottom left corner.
Victory already appeared a near-certainty, and was taken beyond doubt in the 79th minute with Adam Fogt's own goal.
As Denmark tired, Robert Mak found space on the left to cross into the area, from where Kastrup BK's Fogt sliced into his own net.
