Celtic will find it difficult if defender Christopher Jullien’s latest injury setback rules him out of Saturday’s clash with Rangers.

That is the view of former Rangers manager Alex McLeish, speaking exclusively to Football Insider after the Frenchman was forced off after 51 minutes against Dundee United on Wednesday afternoon.

The 27-year-old was stretchered off with a knee injury after colliding with the post following a last-ditch goal-line clearance early on in the second half.

After the game, manager Neil Lennon refused to rule out Jullien for Saturday’s trip to Ibrox.

He added: We’re okay in terms of cover – but Christopher’s a big game player and we’d like him fit if possible.

Asked by Football Insider whether he would be worried for Celtic if Jullien is ruled out, McLeish said: “Jullien has been a big player for them, no doubt about it.

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“He’s been very, very consistent.

“Even when he was out of the team there, Ajer seemed to lose a little bit of form, they struck up a good partnership with Shane Duffy coming in and Lenny playing the three at the back.

“Having the skill to change the tactics and go in a back four, he can do that as well and he’s capable.

“That is something no manager wants to see – having your defence disrupted.

“Oh goodness, you can lose a winger, you can lose a midfielder but when you’re losing somebody that’s bang on form, who has a great partnership with someone else it doesn’t happen seamlessly when you bring someone else in.”

Jullien missed almost two months of action earlier on this season with a back injury when the Hoops suffered their only league defeat and two Europa League losses that effectively saw them dumped out of the competition at the group stage.

In other news, a top pundit has destroyed a £2.5million Celtic capture on “big ”wages.