Celtic face Rangers at Ibrox in the first Glasgow Derby of the season.
Win it, and Celtic go nine points clear of their big rivals at the top of the Scottish Premiership table.
However, if Celtic lose the game, the gap closes to three points and Rangers are given a little ray of light of the possibility to win the league title.
However, after Celtic lost to Kairat Almaty in the Champions League and Rangers suffered humiliation against Club Brugge, a win for either club will be a massive confidence boost.
But if Celtic beat Rangers, is the league title over? Chris Sutton and Steven Naismith both have their say.

Steven Naismith says Celtic ‘not been the same’ ahead of Rangers game
Celtic have a 100% win rate in the Scottish Premiership so far but it seems that Steven Naismith is not entirely convinced about the Bhoys heading into the Rangers game.
Naismith told The Warm-Up [8m], “At the start of last season Celtic flew, playing, scoring, blowing everybody away. First Old F-rm was brilliant.
“Results-wise they have been good. But performance-wise they’ve not been the same as they were at last season.”
In truth, Naismith is correct. But it could be worse, as Rangers fans well know.
Chris Sutton blasts ‘absolutely ridiculous’ Celtic and Rangers claim
Sutton was not convinced of Naismith’s assertion. However, the Celtic hero hit back at what he’s been hearing about the league title being over if the Hoops beat Rangers on Sunday.
Sutton replied, “I think league-wise though, I’d maybe accept that, but Celtic will turn around and say, ‘Well, we’ve won three games. There’s more to come. We’re not at the level that’s a good thing’.
“I mean, there’s talk if Celtic beat Rangers, is that the league over? I don’t see that as being the case. That’s absolutely ridiculous. What? 34 more games to go, regardless of the result.
“But I do think I’ve misjudged Russell Martin and the feeling towards him. I do think it’s really pivotal for him to get some sort of result because it even the bailout last season, it got that desperate at Rangers, some Rangers fans are are clinging to is the fact that well at least we got the better of Celtic.”
It will be extremely difficult for Rangers to catch Celtic if Brendan Rodgers leaves Ibrox with all three points.
Even a draw would be welcomed by many Celtic fans.
If Celtic do win, is the league title over? It would be very difficult to say no.
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