Tom Rogic endured a disappointing evening as Celtic suffered defeat in their final Europa League group-stage game.
Glasgow Rangers are reportedly interested in handing Steven Davis the chance to return to Ibrox in January.
Leicester City paid £12million to sign Filip Benkovic in the summer, so would they really sell him to Scottish Premiership champions Celtic?
Ibrox club Glasgow Rangers striker Alfredo Morelos has disciplinary issues.
Glasgow Rangers midfielder Scott Arfield was sent off in the Ibrox side's latest victory.
Glasgow Rangers goalkeeper Allan McGregor is praised by former Ibrox star Barry Ferguson.
Rangers will be in the market to bring new signings to Ibrox in January.
Glasgow Rangers could go to the top of the Scottish Premiership if the Ibrox side win on Sunday.
Rangers boss Steven Gerrard has made a decent start to his spell in charge at Ibrox.
Ex-Celtic playmaker Stuart Armstrong left the club this summer.
Vellios is out of favour at Nottingham Forest, but might he have better luck at Ibrox, where Rangers legend Ferguson is being tipped to return as Caixinha's assistant?
Ferguson may not have won a game in charge of League Two Clyde since November but that has not stopped speculation linking him to Rangers.
The former Rangers captain would certainly be an interesting appointment.