Celtic winger James Forrest has urged his team-mates to be "at it" from the first minute against Ajax on Thursday night.
The Bhoys drew their opening two games in their Europa League group, away at Ajax (2-2) and at home to Fenerbahce (2-2), but home and away defeats to Norwegian side Molde has left their hopes of reaching the knockout stage hanging by a thread.
Celtic now need to beat Ajax and then beat Fenerbahce in their final group game to quality; anything less will see Ronny Deila's men out of the Europa League.
Forrest is anticipating a tough game against Ajax and believes Celtic must be prepared from the very start.
He told Celtic TV: "It's going to be a hard game, it was hard over there.
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"They are a good team so all the boys are going to need to be at it from the start."
While Celtic drew 0-0 at home with Kilmarnock in league action on Saturday, Ajax were rampant in their league game.
Indeed, the Amsterdam club thrashed Cambuur 5-1 at home to maintain top spot in the Eredivisie.
