Will Derek Mc Innes complete the double against Celtic, or can Martin O'Neill recover from a nightmare week to move eight points clear of Rangers?

The Old Firm sides meet in the Scottish Premiership on Sunday, live on Sky Sports, seven days after the Ibrox side laid down a marker with an emphatic League Cup win.

While Mc Innes appears to have weathered an early storm at Rangers, O'Neill is looking for solutions after Celtic followed up that 3-0 defeat with a 3-1 loss to Ferencvaros in the Europa League.

Only Celtic fans will be inside Parkhead at the order of the authorities amid a ticket allocation spat between the two Glasgow giants.

We look at some of the talking points ahead of what is sure to be another fascinating encounter...

Is pressure mounting on O'Neill? Just a few months ago, O'Neill was at peak legendary Celtic status after saving their season to deliver a league and cup double. However, the League Cup defeat to Rangers, followed by their Europa League loss to Ferencvaros means Sunday could be seen as a must-win for the veteran boss - even if the 74-year-old does not think so.

Is Mc Innes out the woods? While the pressure is mounting at Parkhead, it appears to be easing at Ibrox after a turbulent start for Mc Innes. A tactical masterclass against Celtic to reach the League Cup semi-finals has switched the momentum. Victory on Sunday would put them just two points behind Celtic, but defeat would leave them eight points in arrears after just seven games.