Fiorentina moved 10 points above the relegation zone after winning 3-0 at home against Spezia, which slipped closer to the bottom three.
Gaetano Castrovilli changed the match when he came off the bench on the stroke of halftime, setting up the opener for Dušan Vlahović early in the second half and scoring another for Fiorentina in the 64th.
Valentin Eysseric added the third eight minutes from time.
Spezia, which stunned AC Milan 2-0 last weekend, remained nine points above the drop zone.
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