With one point better, the sky blues go back for at least 24 hours ahead of their big rivals in the capital, Roma, who travel to Cremonese on Tuesday (6:30 p.m.).
Spaniard Luis Alberto scored the liberating goal for Lazio in the 80th minute, with a shot from the right from about twenty meters full axis, superbly curled into the upper right corner of the goal.
Sampdoria remains stuck in 19th position, in a relegation position with only 11 points, 9 lengths from the first non-relegation player.
Earlier in the evening, Fiorentina went to win 3-0 in Verona, which remains 18th and also relegated.
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