Vitesse head coach Henk Fraser has openly admitted his side were well below par during their Europa League defeat on Thursday.
The 2-0 defeat to Belgian side Zulte Waregem at the GelreDome left them winless and at the bottom of Group K after four games.
With one point, having to face Lazio and OGC Nice for the final fixtures, Fraser has conceded their campaign has not gone to plan.
Marvin Baudry's opening goal set the tone against Vitas, before Onur Kaya's second-half strike visibly killed the confidence of the home side.
"Maybe going 1-0 down after three minutes was a sign that it was not going to be our night," he told reporters.
"We did not perform well and there are always reasons as to why that happened. We were irritated about conceding an early goal as we spoke about potential threats of Zulte Waregem during the run up to the game.
"I always try to analyze and put defeats into context," Fraser added. "As a manager and squad we have failed collectively tonight and in Europe this season in.
"We missed a chance tonight and there is a lot of frustration from our point of view. We now have to pick ourselves up and be ready for the Eredivisie game against PEC Zwolle on Sunday."