The pitch side medics performed CPR on the player and the game was suspended.
He was taken to hospital where he was stabilised.
In a message shared on his Instagram, he said: "Hello everyone,
"Big thanks for your sweet and amazing greetings and messages from all around the world.
"It means a lot to me and my family.
"I’m fine – under the circumstances.
"I still have to go through some examinations at the hospital, but I feel Okay.
"Now, I will cheer on the boys on the Denmark team in the next matches.
"Play for all of Denmark.
This message was coupled with a photo of him smiling from his hospital bed.
The game against Finland was resumed later that evening.
Finland won 1-0.