Celtic boss Brendan Rodgers sprung a tactical surprise in the first leg of the Europa League tie against Zenit, moving to three defenders at the back and playing Kieran Tierney, normally the side’s full-back, in a winger type role.
The move worked, as Tierney’s runs down the wing caused the Russians all kinds of trouble in the Hoops’ 1-0 victory.
Now with the second leg set to take place on Thursday, the Hoops boss another big decision to make, if to keep his three at the back system, or return to four and move Tierney back to his left-back position.
It would make more sense to move back to the four, at the start of the game anyway.
The Hoops aren’t going to be on the front foot for the majority of the game like they were in the first leg, in fact it’s more than likely they’ll be spending most of their time defending.
Therefore it’s important to be as defensively sound as possible, and despite his forays forward the key 20-year-old is more than capable or sticking to his duties defending.
If the Celts end up chasing the game then there is always the prospect of changing formations and pushing Tierney further forward, but for the start of the game at least it’s all about not conceding a goal and a solid defensive performance from the Hoops.
In other Celtic news, Rangers aren’t yet consistent enough to provide a title challenge to the Hoops 
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