Vitesse Arnhem star Abubakari Yakubu will be sidelined for up to a month with a thigh injury.
The midfielder picked up the injury in the 5-1 weekend win over RBC Roosendaal and examinations have shown a crack to the player's upper leg.
However, the club have been boosted by the news that Tom de Mul and Etienne Esajas will resume training this week.
Both players have been struggling with ankle problems but will be back in contention for a place in Vitesse's team against NAC Breda on Friday.
Peter van den Berg is also making good progress following seven months out with a knee injury and should return by the end of the month.