Kees injury blow
By Gerrit van Leeuwen
Last Updated: 01/01/70 1:00am
Van Wonderen picked up the problem during Feyenoord's 4-2 defeat at RBC Roosendaal on Saturday.
Though the centre half survived the 90 minutes, he was struggling at the final whistle.
He has been ruled out of Feyenoord's Champions League clash against Dinamo Kiev on Tuesday and must wait to discover the extent of the damage.
South Korean ace Song Chong-Gug is also expected to miss the battle against the Ukrainians after being substituted against RBC due to an injury.