The summer signing from Hibernian has still not started for the club.
The Bhoys take on Ajax in the competition looking to pick up a crucial three points in their hunt for qualification to the knockout stages.
But with Scott Brown, Nir Bitton and Stefan Johansen all definitely out of contention the Motherwell striker has told the BBC he would like to see the former Hibernian man given a chance:
"I would like to see Scott Allan get a chance as well to see what he is made of.
"He's not really had a little sniff since he's come to the club. Obviously injuries have been a problem for him as well.
"But the likes of himself and maybe (Callum) McGregor will be getting a chance tonight to prove themselves."
Celtic snapped up Allan from Hibernian in the summer from the clutches of Glasgow rivals Rangers. The Ibrox side had several bids for the player rejected in the summer as Hibs made it clear they did not want to sell their star player to their main rivals in the hunt for the Scottish Championship title.
But since making his move to Celtic Allan has barely got a look in. He has played just three times since the move and is yet to start a single game under Ronny Deila.
With the list of injuries in central midfield growing the young midfielder will be expecting some action this evening.
If not he will begin to wonder if he is at the wrong Glasgow club.