All of Celtic's plans have been thrown completely into limbo.
If Rangers win on Sunday, then the Hoops will fall eight points behind in their quest to win ten titles in a row.
Furthermore, their transfer blueprints are now in disarray too.
Boli Bolingoli's foolishness last week, visiting Spain and failing to isolate upon his return, has seen two of their matches postponed.
On top of that, Bolingoli could be banned for eight games.
As a result, Celtic are now unaware of whether he'll be coming or going. Middlesbrough failed to sign him on loan last week but Amiens are now trying to sign him temporarily.
Whether that eight-game ban has an impact on a move, though, is unknown.
If the Belgian defender does leave then it's thought that Leeds' Barry Douglas could arrive as his replacement. It would appear that Celtic have turned their eyes to improving the defence.
Shane Duffy of Brighton may sign on loan but he isn't the only centre-back on Nick Hammond's radar.
Reports from SampNews24, suggest that Celtic are one of a plethora of clubs interested in signing Gambian defender Omar Colley.
The Sampdoria centre-back has gained several admirers and could leave Italy behind this summer.
Also chasing the 27-year-old are Newcastle and Burnley.
The 6 foot 3 defender is currently rated at just £4.95m according to Transfermarkt, so Celtic probably won't have to pay much in order to land Colley.
GIVEMESPORT'S Matt Dawson says...
With Jozo Simunovic departing Glasgow this summer, there was always the need for an added body in the centre of Celtic's defence.
A host of centre-backs have been touted since. Whether it be Philadelphia Union youngster Mark McKenzie or the aforementioned Duffy, Hammond has certainly been out identifying possible replacements.
McKenzie's reputation is growing in the USA, but he doesn't have the top-flight experience that Duffy and Colley posses.
The latter appeared 31 times in Serie A last season, even facing off against Cristiano Ronaldo and Juventus.
Colley couldn't prevent the forward from scoring but he was a bulldozer for much of the season.
In earning a colossal ten yellow cards, he won 2.8 aerial duels per match and also cleared the ball 4.8 times per game.
He is a classic no-nonsense defender but he does also have the ability to play the ball on the deck - completing 81.4% of his passes.
Consequently, Lennon could utilise the centre-back in a variety of ways.