Borussia Dortmund manager Nuri Sahin has emphasized that Celtic should not be regarded as underdogs ahead of their Champions League clash, highlighting Celtic's impressive unbeaten run and strong defensive record this season. Dortmund, who reached the Champions League final last year, are wary of Celtic's form, which includes a perfect start to the season with nine consecutive victories. Sahin praised Celtic's tactical strength, particularly noting striker Kyogo Furuhashi's intelligent movement and timing. He acknowledged Celtic's rich history and talent, stating that it would be 'unfair' to underestimate them. The match will also mark a reunion between Sahin and Celtic's manager Brendan Rodgers, who influenced Sahin's coaching style during their time together at Liverpool. Dortmund's recent form includes three wins in their last four matches, but they remain cautious after a heavy defeat to Stuttgart.