After Dortmund's team bus was caught up in an apparently targeted attack, the first leg of the quarter-final was postponed on Tuesday. The team was attacked with explosives while they were departing from the team hotel for Signal Iduna Park. Marc Bartra had to undergo surgery on a fractured wrist as a result of the blast.
Coach Thomas Tuchel wanted more time for those affected to take stock of the incident. He described the rescheduling as "absurd" after the fixture was consequently pushed back to Wednesday.
UEFA confirmed that both clubs were involved in the decision-making process and did not imply they would be unwilling to participate. They said this in response to the outpouring of criticism of UEFA's handling of the matter.
A UEFA spokesperson said: "The decision to play the UEFA Champions League match between Borussia Dortmund and AS Monaco FC on Wednesday at 18.45CET was made on Tuesday night at the BvB Stadion Dortmund in cooperation and complete agreement with clubs and authorities.
"UEFA was in touch with all parties on Wednesday and never received any information which suggested that any of the teams did not want to play."