CSKA Moscow moved three points clear, at least temporarily, in the Premier League table with a 2-1 win over bottom club Mordovia Saransk.
CSKA's nearest challenger Anzhi Makhachkala faces third-placed Zenit St Petersburg away from home on Monday evening (Tuesday morning AEDT).
Dinamo Moscow was also a 2-1 winner, away to Terek Grozny.
Russian Premier League
Spartak Moscow substitute Majeed Waris scored a late winner against Rostov to ensure his side will go into the winter break just a point off top spot in the Premier League standings.