Former Rangers youngster Greg Stewart returned to stun his former club in the Scottish Premiership draw against Kilmarnock on Wednesday at Ibrox.
Greg Stewart failed to score a single Championship goal for Birmingham, but he has rediscovered his form in the Scottish Premiership with Kilmarnock.
Both players spent last season away from Birmingham City.
The Aberdeen boss said he is keen to continue working with both Ryan Christie and Greg Stewart
Hearts and Hibs are interested in rescuing Greg Stewart after a disastrous season at Birmingham City - but Rangers are nowhere to be seen.
Dundee talisman Greg Stewart was linked with Rangers last summer - but he's hardly set the world alight since moving to Birmingham City instead.
Which Birmingham players would fans not mind seeing the back of this month?
The boyhood Glasgow Rangers fan was a reported summer target for Ibrox boss Mark Warburton.
Mark Warburton wanted to bring the former Rangers youngster back to Ibrox in the summer.
All the team news ahead of Blues first ever trip to the Pirelli Stadium.