Vitesse Arnhem have demoted midfielder Richard Knopper as punishment for walking out on training last week.
The former Ajax man was disciplined by Vitesse's board after leaving training early following a dispute with manager Aad de Mos.
Knopper was left out of Vitesse's season opener on Friday evening, as the Arnhem club started their Eredivisie campaign with a 2-1 away win at Sparta Rotterdam.
The 29-year-old has been ordered to train with the club's reserves side until September 1.
Vitesse, meanwhile, have handed a trial to Austrian international goalkeeper Thomas Mandl.
De Mos is keen on finding another goalkeeper after Vitesse number two Piet Velthuizen recently underwent an operation to repair a damaged knee meniscus.
Mandl's former clubs include Austria Vienna and Sturm Graz, as well as Swiss giants Basel.