Koopmeiners was knocked out completely.

against Poland after engaging in an aerial duel with Karol Linetti

Tun Koopminers suffered a serious injury in the opening minutes of the Netherlands Nations League match.

When in Thursday night's Nations League match between the Netherlands and Poland

There were terrifying scenes when the Coopminers were finished in over a minute.

After an aerial duel with Karol Linetti,

The Atalanta midfielder made an awkward landing and appeared to sustain a sick injury.

While going down, Linetti inadvertently grabbed the Dutchman with an elbow on the back of the head.

And as medical personnel hastened to help the Dutchman, he was left out in the cold on the PGE Narodowy field.