Celtic manager Brendan Rodgers insists his side can bounce back and overturn their first leg defeat to Valencia when they meet again on Thursday night.
The Hoops lost the first match on home soil last week and Celtic now face a huge uphill struggle to progress into the last-16 of the Europa League.
Celtic were guilty of making mistakes on the big stage and Rodgers admits his team need to learn their lessons going forward.
The Scottish giants have not won in Spain in 15 attempts, but Rodgers insists the club has a history of overcoming adversity.
He told reporters: “It was disappointing last week but we can come back again tomorrow night and that is something that is very much within our culture.
“We know it is a challenge but if I look at the game and ask myself ‘do we have a chance’, of course we do. That’s been the make-up of this group since I came. It’s a game that we look forward to.
We obviously have to work our way into the game. “Our focus is on bringing our game. We need to be strong and aggressive, we can’t make mistakes. We made two mistakes and found ourselves two down.
“If we can get that first goal that will give the team that extra confidence to go and get another.”
Valencia are 1.60 favourites to win the game at the Mestalla, while the draw is 4.00 and Celtic remain 5.50 outsiders.