Ajax midfielder Abdelhak Nouri is “out of danger” but remains in intensive care after collapsing during a pre-season friendly against Werder Bremen.
The incident, which happened during Saturday’s game in Hippach, Austria, led to the match being abandoned.
Ajax said Nouri, 20, had suffered “cardiac arrhythmias” – heart rhythm problems – during the game.
An open training session by the 33-time Dutch champions planned for Monday has been cancelled.
Nouri was part of the Ajax squad for the Europa League final against Manchester United in May.