Martin O'Neill is back for a third spell as Celtic manager and will be looking to breath life into their faltering SPFL Premiership title defence when Dundee United come calling.
The veteran left the Hoops in pretty good shape when his spell as interim boss came to an end last month, having moved level on points with leaders Hearts and booked a place in the League Cup Final.
But Wilfried Nancy's disastrous reign undid all O'Neill's good work, with the Frenchman losing six of his eight games before finally being put out of his misery.
Last weekend's 3-1 derby loss, which brought up a full house of bets for Greg, was the final straw and O'Neill has now inherited a side sitting third in the table.
He can ill afford any more dropped points against Dundee United, who also head into this game off the back of a disappointing derby loss at home.
I fancied Jim Goodwin's men to beat Dundee at Tannadice but they fired blanks in a 1-0 defeat, bringing an end to their five-match unbeaten run.
They beat the Hoops at home just a few weeks ago when Nancy was in charge but O'Neill's return has made their task harder as United look to do the double.
How the bookies view it: O'Neill to work his magic
It would have been interesting to see how the bookies would have priced this one up if Nancy had remained in charge but Celtic are now heavy favourites after O'Neill's return.
They are a best 1/3 at Ladbrokes while Dundee United are 7/1 outsiders with most firms and the draw pays 17/4 at Bet365.
Recent head to head: More Parkhead pain for United?
Dundee United's 2-1 win at Tannadice last month was their first victory over Celtic for 11 years. You have to go back to 1993 for United's last Parkhead triumph and the Hoops have won 10 of their last 11 at home to United.
Players to watch: Yang of the moment
The one positive from last week's derby defeat for Celtic was the display of winger Yang Hyun-jun. He turned in his best display for the club and scored a terrific solo goal. The Korean is 43/20 at BetMGM for another strike and a decent 10/11 with Bet365 to score or assist.
Zac Sapsford scored United's winner when they last faced Celtic and the Aussie sits on eight goals for the season. He's 7/4 for a goal or assist with Bet365 for this one.
Probable line-ups
Celtic could have Sebastian Tounekti and Michel Ange Balikwisha back after Tunisia and DR Congo were knocked out of the Africa Cup of Nations. Cameron Carter-Vickers, Alistair Johnston, Jota, Kelechi Iheanacho and Marcelo Saracchi remain out.
Dundee United have Ross Graham and Pan Camara fit again but Isaac Pappoe and Ryan Strain are set to miss out.
Celtic: Schmeichel, Araujo, Trusty, Scales, Tierney, McGregor, Engels, Hatate, McCowan, Yang, Maeda.
Dundee United: Richards, Ferry, Iovu, Kerezstes, Graham, Camara, Sibbald, Stephenson, Trapanovski, Fatah, Sapsford.
Anything else catch the eye?
O'Neill first task will be to sort out a defence that had been leaking goals in Nancy's kamikaze 3-4-2-1 set-up. He will likely resort to a back four and I'd imagine United boss Jim Goodwin will set up to frustrate.
That suggests an avalanche of goals is unlikely and under 3.5 strikes looks decent value at 10/11 with Bet365. Betting against BTTS is a bit bigger at 6/5 with 888Sport.
Celtic will probably start at a high tempo and we could see plenty of first-half corners. Backing over five corners in the opening 45 minutes pays 6/5 with Bet365.
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