Danish professional footballer Christian Eriksen suffered a cardiac attack when he collapsed in Denmark’s Euro 2020 match against Finland, Danish team doctor Morten Boesen said.
Earlier officials said the midfielder was stable in hospital.
The mid-fielder collapsed shortly after the half time in Denmark’s opening Euro 2020 game against Finland on Saturday.
“He was gone. We did cardiac resuscitation, it was a cardiac arrest,” said Boesen.
“How close were we to losing him? I don’t know, but we got him back after one defib [defibrillation] so that’s quite fast.
“The examinations that have been done so far look fine. We don’t have an explanation as to why it happened.”
The 29-year-old Inter Milan player had emergency medical treatment on the pitch before being taken to hospital.
“His condition is stable and he continues to be hospitalised for further examination,” said a statement from Danish officials on Sunday morning.
Saturday’s incident happened as a throw-in was played towards Eriksen near the end of the first half.
His distressed team-mates surrounded him and the shocked supporters at Parken Stadium were visibly upset as the player was treated.
Boesen said Eriksen was unconscious when he reached the player on the pitch.
“When I got to him he was on his side, he was breathing, I could feel a pulse, but suddenly that changed and we started to give him CPR,” he said.
“The help came really fast from the medical team and the rest of the staff with their co-operation, and we did what we had to do and managed to get Christian back.”
Only once informed that Eriksen was awake in hospital did the players agree to resume the match, with Finland going on to win 1-0.
Last month, Eriksen helped Inter clinch their first Italian title for 11 years in his first full season with the club, after joining from Spurs for £16.9 million in January 2020.
The Ajax youth player spent seven years with Tottenham, scoring 69 goals in 305 appearances.