The Millers manager signed the Celtic midfielder on a season-long loan in the summer and would have been hoping to help him rediscover the form they showed together at Hibs.
Allan moved to Celtic just over a year ago after impressing under Stubbs at Easter Road, but he was barely given a look in by Ronny Deila before Brendan Rodgers decided to send him out on loan for regular first team football.
He’s been getting that so far, appearing eight games so far this season, but he was dropped entirely from Rotherham’s squad for their recent clash with Cardiff.
Now Stubbs has explained why he was left in the stands – and it doesn’t reflect well on the Celtic man’s commitment.
Stubbs told the Sheffield Star, per celtsarehere.com: “The one thing I expect is 100 per cent commitment. I want to see that players care. I want to see character.
“If they give me that, then if they have a poor game I can accept that all day long.
“Nobody can play brilliantly every week. I understand that. That’s life.
“An element of Scott not being in the squad against Cardiff was a reaction to what I saw against Blackburn (a week earlier).
“We just left him out of the squad to reflect on his performances. He’s someone we feel has a lot more to offer than he is showing right now.”
That won’t make good reading for Celtic fans or Brendan Rodgers.
Both will be hoping Allan’s loan stint in the English Championship shows his best form and prepare him for returning to the Scottish champions to challenge for a regular first team spot.