Davie Hay has warned Celtic not to concede an early goal to Valencia or else they are in for a long night.
Brendan Rodgers takes his side to the Mestalla on Thursday night looking to overturn a disappointing 2-0 defeat from the first leg a week ago.
Getting the first goal would open the tie up for the visitors but Celtic have taken a few European hidings in recent seasons and Hay has warned to put safety first in the opening stages.
In the Evening Times he stated:
“I think it will be a difficult night, but what you will find out in the opening 15-20 minutes is whether or not Celtic can go and cause a little bit of unrest within Valencia.
“If they lose an early goal, it is an exceptionally long night. The only thing that might work in their favour is the fact that Valencia and their support will expect this game to be little other than a walk into the next round.
“Publicly, of course, the Spaniards won’t come out and say that but there will be a feeling that they pretty much sealed their progress with the first leg win last Thursday night. Their support will be turning up expecting to see them turn on the style.
Rodgers has no fresh injury worries to deal with tonight with his biggest decision being over whether Timo Weah gets a place in his starting XI.
The on-loan Paris Saint Germain forward has made a big impact as a substitute in recent matches including the late victories over St Johnstone and Kilmarnock.
Getting Weah in from the start would pose a fresh threat to the Valencia defence, with Celtic toiling last week to make in roads on the Spanish defence.