A stoppage-time Pablo Osvaldo goal gave Fiorentina a 3-2 win at third-placed Juventus on Sunday lifting them to within a point of the Turin side in the Serie A standings.
Goals from substitute Osvaldo, who was sent off for a second yellow card for waving his shirt in celebration, Papa Waigo N'Diaye and Massimo Gobbi gave Fiorentina the spoils after Mauro Camoranesi and Momo Sissoko had found the net for the hosts. Juve stay third with 48 points from 26 games, 13 behind leaders Inter, who take on Napoli away later on Sunday.
AS Roma trail Inter by six points in second after thrashing Parma 4-0 on Saturday.
The win tightens Fiorentina's grip on Italy's last Champions League qualification slot, taking them four points clear of AC Milan, who were held 1-1 by Lazio at the San Siro on Saturday.
Fiorentina, without their injured top-scorer Adrian Mutu, took a deserved lead in the 19th minute when Gobbi slipped the ball home after a one-two with Martin Jorgensen.
The visitors came close to doubling the advantage shortly after but Gianluigi Buffon managed to keep out a Riccardo Montolivo effort with the help of the post.
Sissoko levelled in the 29th with an overhead kick after Fiorentina keeper Sebastien Frey made a mess of dealing with a free kick. It was the Mali midfielder's first goal since joining Juve from Liverpool in January.
Juve's Italy international Mauro Camoranesi floated unmarked behind the Fiorentina defence to volley home a Cristian Molinaro cross 12 minutes into the second half.
Senegalese striker N'Diaye came off the bench to restore parity with a diagonal strike and provided the cross for the winner by Osvaldo.
Two first-half goals in quick succession by Italy forwards Fabio Quagliarella and Antonio Di Natale gave sixth-placed Udinese a 2-0 home win over Atalanta.
Basement club Cagliari boosted their hopes of avoiding the drop with a 2-1 win over Genoa.
The Sardinians are still in big trouble after being deducted three points on Friday for breaking federation rules by taking a legal dispute with a former player to the civil courts without permission.