Feyenoord have received mixed news on the injury front this week.
Serginho Greene and Angelos Charisteas picked up knee and hamstring injuries respectively during Sunday's meeting with AZ Alkmaar.
Scans have revealed that Greek striker Charisteas will be back in action in around a week, but the news on Greene is far less positive.
Tests revealed the defender tore the cruciate ligament and is unlikely to play again this year.
Theo Lucius has returned to training, though, having overcome a hamstring problem and is in contention to face Willem II at the weekend.
Jacob Lensky has shaken off a calf complaint and could also take on Willem II.