The 23-cap midfielder will miss the Eredivisie match between his PEC Zwolle side and Utrecht on Monday (NZT) after playing on painkillers in recent matches.
“It’s not a strain, but it’s restricting him enough,” PEC Zwolle coach Henry van der Vegt told Dutch media.
“At some point, you’ll be taking a lot of risks, and we don’t want that.
“If he could have trained today, he would have been in the squad. There were too many ifs and buts, so we decided to keep him out. We want to keep him fit for longer.”
Van der Vegt said he hopes Thomas, who is the team captain, would be able to return for PEC Zwolle’s game against Ajax on Monday March 2, 2026 (NZT).