To keep the Scudetto campaign open, Lukaku and Raspadori put Napoli on winning track to defeat Fiorentina in spite of a goal from Albert Gudmundsson.
After ten minutes, Raspadori could have scored when Giovanni Di Lorenzo rolled across the ball and scuffed the finish at David De Gea from ten yards out.
Romelu Lukaku lost a six-yard battle with Pietro Comuzzo, and his penalty appeals were dismissed.
Scott McTominay cut inside and attempted a shot from the area’s edge, but De Gea only parried it into Lukaku’s path, giving Napoli the lead. The Belgian scored his first goal since January 25 and his tenth Serie A goal of the year.
De Gea had to parry with an outstretched boot after Raspadori held off Comuzzo to divert the shot away from the by-line.
Fiorentina also posed a threat when Moise Kean, assisted by Fagioli from a corner routine, nodded over from six yards out.
At 34 minutes, Di Lorenzo nearly doubled Napoli’s lead as his hammer struck the top of the crossbar.
De Gea kept the score low by palming a Raspadori effort around the near post after once more using his feet to block Leonardo Spinazzola’s angled shot.
Although Fagioli appealed for a penalty, Gilmour’s foul was clearly outside the area.
Raspadori started the well-executed passing move from midfield, then sprinted onto the Lukaku through ball to take a touch and sweep past De Gea mostly undisturbed, giving Napoli a two-goal lead.
But Fiorentina regained the lead when Gudmundsson blasted into the box through the center and swept right-footed into the near bottom corner after Kean’s brilliant back-heel flick cleared the way.
Moments later, there were protests that Gudmundsson might have been given a second yellow card for colliding with Raspadori, but the referee decided that a free kick was adequate because both players were fully stretched on a loose ball.
De Gea palmed a Politano angled drive around the near post, Fagioli curled off target from outside the box, and Comuzzo charged down the Politano half-volley on another Lukaku pass.
Running from his own half, Giovanni Simeone should have scored for Napoli in stoppages against his old team, but instead he pushed the feeble effort directly at De Gea.
Cher Ndour sent the shot over from a corner when even De Gea had gone up as Fiorentina surged forward to the very end.
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