Celtic suffered a disappointing 0-0 draw against Kilmarnock on Saturday, and manager Ronny Deila needs a big response against Ajax - but their performances in Europe have been a major disappointment.
The Bhoys lost to Malmo in a two-legged play-off for the Champions League, but fans still had hope that European success was a possibility after being drawn in a Europa League group against Fenerbahce, Ajax and Malmo; three huge appointments.
So far, Celtic are without a win in the Europa League this term, drawing twice and losing twice to sit bottom of Group A with just two points.
To have any chance of making it to the knockout stages, Celtic have to beat Ajax tonight - but former Bhoys striker Charlie Nicholas doesn't think it will happen.
Speaking to Sky Sports, Nicholas predicted that Celtic will get beat 2-1 by Ajax tonight, but thinks Deila's men could have an early rally by feeding off a passionate Celtic Park crowd.
"It's a must win for Celtic and even if they do so it might not be enough with a tough trip to Fenerahce to follow," said Nicholas. "They will take the energy and aggression from the crowd and look to break down the door in the opening 20 minutes. If they fail to do that and the fans start to go quiet then I think Ajax will pick them off."
"They've been unconvincing throughout the campaign and I've not seen a win coming for them, which is why I've not been backing them and I'm afraid that continues," he added.