Ajax player Abdelhak Nouri received treatment on the field after collapsing during Saturday's friendly against Werder Bremen in Austria, with the Eredivisie club describing the situation as "serious".
"Emergency services are still [treating] Nouri, players look anxious", Ajax tweeted.
The 20 year old midfielder was immediately transported to the hospital to receive the necessary medical care.
Werder Bremen, who had been leading the match 2-1, conveyed their best wishes to Nouri, his family and Ajax via Twitter and added that their own players were receiving psychological treatment.
Ambulances and paramedics then tended to Nouri on the pitch, with a screen drawn around him.
Mother and three children die in Bolton house fire
One of the children was pronounced dead at the scene, and the woman and two other children later died in hospital. A witness said she watched as emergency services performed CPR on two people taken from the burning building.
Blue sheets were used to shield the fans from the distressing incident, with Nouri having come on at the start of the second half.
"There was talk of hearth rhythm disorders".
"Nouri is now [being] flown by helicopter to hospital. He is stable [and] has [a] heart rate", Ajax tweeted.
Ajax have given an update on Nouri's health, with the player said to have suffered from arrhythmia.
Nouri, who has represented the Dutch national team at all youth levels from under-15 to under-19, is not related to Werder Bremen's coach Alexander Nouri.
- Shia LaBeouf arrested for disorderly conduct and public drunkenness
- Edhi's first death anniversary observed
- Kalyani Priyadarshan Signs Akhil's Movie!
- Genesio attend un défenseur rapidement — OL
- Venezuelan opposition figure Leopoldo Lopez granted house arrest due to health problems
- Knicks Sign Issue Sheet with Tim Hardaway Jr. for $71 Million
- LG's Q2 profits lower than expected, struggling mobile division to blame
- Short Term Technical Outlook: FNB Corporation (FNB), People's United Financial, Inc. (PBCT)
- Wolves PF Taj Gibson arrested for driving with suspended lisence
- The Ulta Beauty (ULTA) Earning Positive Press Coverage, Study Shows