Disaster struck at Wembley after an energetic start in the Nations League match between Denmark and England.
Maguire saw his first yellow of the match for a needlessly dangerous tackle on Poulsen.
The United player didn't let a yellow stop him as in the 32nd minute he flew into another reckless challenge that saw him ejected from the game.
England's woes didn't end there though. Just minutes later Kyle Walker attempted to clear an aerial ball in the England' box and kicked out, hitting Wass' leg in the process.
Eriksen stepped up to the penalty spot and drove the goal home with a strike down the centre of the net.