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Denmark required an injury time penalty from Christian Eriksen to secure the three points needed to take their Nations League group to a decider against Belgium on Wednesday.
However, before that game, they'll have the pressing matter of a potential concussion for their number one keeper to contend with.
The Leicester City goalie came for a ball on the edge of the area but on rushing Iceland forward Albert Gudmundsson caught Schmeichel in the head with his leg.
It looked like the former Manchester City keeper was out cold momentarily before getting to his feet and being subbed off at half-time.
Nasty looking head/neck injury for Denmark/Leicester City GK Kasper Schmeichel w/ possible transient loss of consciousness. Seems also some right sided upper back discomfort. Able to walk off pitch but will need complete concussion assessment. #EPL #DEN #LCFC #PremierLeague https://t.co/9jJ1DvhOFN- InjuryMechanisms (@IMechanisms) November 15, 2020
Denmark need to win the game against Belgium to leapfrog their rivals in the group and make it through to the finals in October next year, after Roberto Martinez's side beat England.
Head injury protocols have long been an issue in football and it was good to see Schmeichel subbed off straight away following the incident.
That isn't always the case and, according to reports, the International Football Association Board (IFAB) are set to discuss the use of an extra sub for concussion incidents.
Trials could start as early as January and would include the opposition being able to make an extra substitute at the same time, in order to stop cheating.
In rugby union, independent doctors check for concussions and a temporary sub can be brought on to allow for a 13 minute head injury assessment to make the decision on whether a player can carry on or not.
Longer term, Schmeichel's injury could be of concern to Leicester City. The Foxes have a huge game next weekend against Premier League champions Liverpool.
Brendan Rodgers' side are the early leaders this season, having won six of their opening eight games, and travel to Anfield on Sunday.
The Reds are only one point behind their upcoming opponents and will know better than anyone the affects of losing players to injury whilst on international duty, with Joe Gomez, Raheem Sterling, Andy Robertson and Jordan Henderson amongst those picking up injuries this week, whilst Mohamed Salah tested positive for Covid-19.