Three explosions rocked the Borussia coach on its way to the stadium in Germany last Tuesday, causing the match to be postponed for 24 hours. Monaco then won Wednesday's game 3-2.
It is still unclear who carried out the attack that injured Dortmund defender Marc Bartra.
"We put what happened behind us, we are emotionally stable and completely focused on the match," Tuchel told a news conference at the Louis-II stadium ahead of Wednesday's second leg.
Read the full article on eurosport.co.uk: Tuchel: Dortmund emotionally ready to face Monaco