This is not a fixture for the faint-hearted punter. Zenit carry the slight edge that comes with playing on familiar ground, and their recent W form at home edges them ahead in our model's assessment. But Spartak Moscow are not here to make up the numbers — they have shown quality on their travels this season and will not be easy to break down. After weighing every variable, our engine leans toward Zenit but does so carefully, registering a win probability of just 42%. Margins will be thin.