Celtic captain Callum McGregor has admitted their play has been "a little bit broken" in recent games.
The Premiership champions followed up Sunday's damaging 3-0 humbling at the hands of Rangers to crash out of the Premier Sports Cup, by losing 3-1 to Ferencvaros on Europa League duty.
It was another poor performance as the visitors found it too easy to counter on them, and cause them problems in the final third.
McGregor was critical of his team after their derby loss, accusing themof not being willing to put in the hard yards out of possession.
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Now, assessing tonight's performance, he told TNT Sports, he said: "They scored at good times. It's a sore one but we have to stick together now.
"It's a little bit broken, a little bit nervy, but we have to fight our way through this. The only way through it is hard work.
"It's a tough period. You can see how quickly it comes down on top of you. It's a relatively new group, so we have to learn. You don't get much leeway.
"The ultimate test at the weekend is that we have to win the game. It's about staying together, putting one foot in front of another and we just need another bit of luck."
