The meeting, held in Sochi at Fisht Stadium, ended 1-0 in favor of the home team.
Sochi's victory was brought by an own goal of defender Pavel Maslov, who cut the ball into the goal of his team in the 24th minute.
Spartak with 33 points due to the difference between goals scored and goals conceded fell to tenth place in the RPL standings. Sochi, gaining 33 points, climbed to ninth place.
Earlier it was reported that Zenit failed to extend its series of victories in the RPL.