Hatem Trabelsi has not joined Ajax on their trip to Switzerland for the Champions League match against FC Thun. The defender is bothered by a hamstring injury.
Trabelsi sustained the injury in Friday's match against Heerenveen (0-0).
Ajax face FC Thun in Bern on Wednesday, in a match for the second place in the group. Angelos Charisteas, Edgar Manucharyan are still out with injuries.
In comparison to the match against Heerenveen, Wesley Sneijder and Julien Escudé have rejoined the squad for Wednesday's match.