Celtic manager Neil Lennon must decide on whether to pick Jozo Simunovic or Filip Benkovic on Sunday.
Some may say this is make or break, his last chance saloon to put his name into the ring for a permanent post.
The Livingston draw at home has put his stock lower than previously and he’ll try to change that.
A treble treble would do himself a world of good, but Aberdeen are the second last obstacle to that.
Lennon must select correct Croatian
Celtic’s top defender this season Filip Benkovic is returning from a lengthy injury.

The Croatian carried the back four into the Europa League group stages but missed the Valencia clashes.
However, Jozo Simunovic has also came in recently and done an amicable job.
He played the full 90 minutes on Sunday while Lennon opted to take off Benkovic – is this a precautionary measure?
The Irishman will have learned a lot of lessons from the game and hopefully doesn’t deploy the same system against Aberdeen.
Benkovic, Simunovic and Ajer can’t all play in the semi and the Norwegian will not be dropped.

It’s all down to the one partnering Croat if Celtic can keep out on-fire Sam Cosgrove for the Dons.
Semi can be Celtic springboard for everyone
Both men haven’t been full season regulars due to injuries and performances.
With Dedryck Boyata out for the rest of the season, there is one centre-back spot up for grabs.
Ajer’s partner will see out the league season with him and also be vying for the treble treble.

Simunovic’s Celtic career has been up and down, while Benkovic has been top dollar during his loan spell from Leicester.
Chances are Lennon will go with Benkovic but Simunovic cannot be ruled out as the Livingston game showed.
He did stick with Simunovic and maybe he sees him as a permanent partner to Ajer.
Celtic’s treble is on a knife edge and everything must be perfect next week to get to the final.
Failure to do that, then Lennon can definitely wish his Hoops dream goodbye.
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