كتب : Filgoal Writer
The former Lazio and Valencia forward secured the precious three points for his side in the 52nd minute when he headed home a Giampaolo Pazzani cross from the right flank.
Firorentina's victory of the season gave them their 32nd point of the season, seven points behind holder Juventus.
Both AC Milan and Inter, third and fourth on 31 and 29 points respectively, hope to clinch the second place later on Sunday when they clash in the Milan derby.
Elsewhere, Erion Bogdani scored after just two minutes to give Siena a 1-0 victory over Empoli.
Sienna are now in the 12th spot with 18 points, just one point and a spot ahead of the losers.