His agent Mikkel Beck confirms the news to TV2 Sport. "His cruciate ligament is damaged. We are awaiting further information, but he may not need surgery," writes Mikkel Beck.
He only managed a single 45-minute appearance during a friendly against Borussia Dortmund on 1 August.
Nicolai Vallys was officially sold to FC Tokyo on 17 July 2026 when the 29-year-old attacking midfielder completed a permanent transfer from Brondby IF for a €2 million fee heavily structured around performance-based bonuses