Group C is the closest battle in the entire group phase of the Champions League this season, with all four teams still having a chance to qualify for the round of 16.
Liverpool, PSG; Red Star Belgrade and Napoli are separated by just 2 points heading into the final two fixtures of the group, with any side at risk of being eliminated from European competition altogether.
Italians Napoli lead the way with six points, with Liverpool behind them in the table by virtue of head to head results. Paris sit in third on five points, while Serbians Red Star are one point further back on four.
Going into the fifth match, the top three sides could theoretically seal qualification for the last 16 by the end of Wednesday, although waiting for a deciding final match at the beginning of December is more likely.
In terms of English interests in this group, Liverpool's task is clear.
If they win in Paris, they qualify. Draw, and they must equal the French champions result in the final group match to progress. But Lose, and Liverpool must beat Napoli by a two goal margin at Anfield on the final day to progress.
Liverpool could potentially progress with two draws from their final two matches; yet this hinges on how Napoli perform against Red Star on Wednesday.
For the Italians, Napoli need only beat Red Star and hope Liverpool conquer Paris, and they will qualify on Wednesday.
Likewise, if they win both of their remaining fixtures, Napoli will advance regardless of any of the other results.
For PSG they must win to keep their fate in their own hands.
With a star studded squad and lofty aspirations to win the tournament as a whole, PSG being eliminated in the group stage is unfathomable.
But in reality, it could happen. If they lose to Liverpool and Napoli beat Red Star, the French champions could be eliminated on Wednesday.
Yet avoiding defeat to Liverpool and beating Red Star on the final day, will surely secure qualification, as one of Liverpool and Napoli are sure to drop points and thus be at risk of elimination themselves.
Finally, not yet out of the race, Red Star will also hold slim hopes of advancing to the next stage.
However, the Serbians have a tough task ahead to achieve it.
Red Star must win away to Napoli and then at home to PSG on the final day in order to qualify.
Belgrade managed to record an historic home triumph against last year's finalist Liverpool on match day , so victories against a similar calibre of opposition is not entirely out of their remit.
Should the Serbians manage this, they will well and truly throw the cat among the fattest of pigeons, who themselves hope to win the competition outright come may.