Inter Milan lost more ground in the race to finish second in Serie A after they slumped to their third successive defeat when they were beaten 1-0 by Fiorentina on Saturday.
With runaway leaders Napoli holding a 19-point advantage over second placed Lazio, Inter could have overtaken Maurizio Sarri's side had they beaten Fiorentina.
Instead, Inter are third with 50 points, with fourth-placed AC Milan only two points behind and with a game in hand.
Romelu Lukaku could have sent Inter ahead four minutes into the second half but the Belgian failed to tap in a cross from six yards.
Giacomo Bonaventura was in the right place after a rebound from a corner and headed the ball into the net from close range to give Fiorentina the lead after 53 minutes.
Inter squandered a chance to draw level six minutes later, with Nicolo Barella's powerful half-volley from the edge of the box hitting the crossbar.
Fiorentina are eighth with 40 points.