Giacomo Bonaventura's late header continued Inter's Atalanta hoodoo as the visitors secured a dramatic 2-1 win at San Siro on Sunday.
In a result that extends Atalanta's winning run to four Serie A games, Bonaventura scored twice, with his winning goal coming after withstanding a second-half barrage from Inter.
However, Inter's profligacy and Bonaventura's brace proved crucial as the hosts missed the chance to move ahead of fourth-placed Fiorentina, who make the trip to Napoli later on Sunday.
After an entertaining start that saw visiting captain German Denis head against the crossbar, the opening two goals came within the space of two late first-half minutes.
Expert finishes from Bonaventura and Mauro Icardi ensured the sides went in level at the break before Inter twice struck the woodwork early in the second half.
Inter, though, failed to make the most of their chances and Bonaventura made them pay - heading home in the 90th minute to extend Inter's winless run against Atalanta to six matches.
With Walter Mazzarri's Inter going in search of a third straight victory, Hernanes played in Fredy Guarin for the game's first opportunity - the Colombian placing an effort marginally wide of Andrea Consigli's left-hand post.
The two combined again shortly after, but this time Guarin opted for power, as he fired over the crossbar.
Samir Handanovic was then required to keep out powerful efforts from Guglielmo Stendardo and Luca Cigarini as he demonstrated some of the form that had seen Inter keep clean sheets in their previous three outings.
Guarin's third effort stung the palms of Consigli before Icardi failed to provide a cutback for Rodrigo Palacio when played in behind the Atalanta defence.
Bonaventura's long-range strike dipped too late to threaten Handanovic before he eventually found the net at the third attempt after 35 minutes.
Following a quick break, Bonaventura made the most of Denis' decoy run to create space before firing past Handanovic.
However, Atalanta's joy was shortlived, as a minute later Icardi collected Guarin's slipped pass before cutting inside his marker and firing home the equaliser to restore parity nine minutes before the break.
As in the first half, Inter began on the front foot after the interval with Guarin at the centre of their attacking threat - firing a shot from distance that clipped the crossbar and went over.
Palacio was then denied by the post as he glanced Jonathan's cross over the helpless Consigli as Inter continued to pile on pressure.
However, Stefano Colantuono's charges secured a dramatic late win thanks to Bonaventura's fifth league goal of the season as Inter's European aspirations were dealt a blow.
|Coach: W. Mazzarri|
for E. Cambiasso 61'
for D. D'Ambrosio 72'
for H. Campagnaro 82'
|Guardiola satisfied with Cologne victory|
|Espanyol 1 Cordoba 0: Abraham goal secures the points|
|Marseille 2 Caen 3: Hosts throw lead away yet again|
|Bayern Munich 4 Cologne 1: Champions move 11 points clear|
|Dordrecht 2 Go Ahead Eagles 1: Klaiber leaves it late|
|Luis Enrique laments English ´campaign´ over Suarez|
|Atletico Madrid v Sevilla: Champions attempt to bounce back|
|De Gea dismisses ´lies´ about Van Gaal relationship|
|Monaco v Paris Saint-Germain: Jardim wants no Champions League distractions|
|Inter v Fiorentina: Both sides on a high after Europa League success|
|Real Madrid v Villarreal: Ancelotti´s side looking to keep chasing pack at bay|
|Arsenal v Everton: Hurting Wenger calls for immediate response|
|Hull and Panathinaikos among four clubs pay FFP fines|
|Liverpool v Manchester City: Champions eye long-awaited Anfield success|
|Lucas Moura out for at least four weeks|
|Chelsea v Tottenham: Mourinho´s men channel spirit of 2005|
|Loan move to Ipswich an easy decision for Wood|
|Qatar World Cup final no later than December 18 - Blatter|
|Martinez excited by Kiev draw|
|Dynamo face disciplinary hearing after crowd trouble|
|Hughes close on signing new Stoke deal|
|Parma game called off again|
|De Boer to stay at Ajax|
|Arnesen backs Vieira as potential future City director of football|
|Mourinho has no fears over Wembley referee|
|Van Persie absent for Sunderland clash|
|Mason hoping to relive 2008 at League Cup final|
|Fiorentina and Roma to meet in Europa League|
|Inter finalise Felipe swoop|
|Poyet delighted to have ´contagious´ Cattermole back|
|Melbourne City 3 Adelaide United 1: Baharudin triggers crucial comeback|
|Chelsea can cope with Matic absence - Terry|
|Mancini: I tried to take Guarin to Galatasaray|
|Wilshere undergoes ankle procedure|
|Bruce: Most Championship clubs would struggle with FFP|
|Henry would say yes to Arsenal job|
|Mignolet backs ´devastated´ Liverpool to regroup|
|Tiote looks set to miss the rest of the season|
|Copa Libertadores Review: Osvaldo scores for Boca, Internacional win|
|Alajuelense 5 DC United 2: Costa Ricans set for semis|
|Besiktas settled score with Liverpool - Cenk|
|Montella: Hard to keep Salah|
|Martinez salutes Everton´s qualification|
|Europa League games marred by crowd trouble|
|UEFA Europa League Review: Lovren misses crucial spot kick as Liverpool crash out|
|Rodgers rues lack of Liverpool guile|
|Pochettino laments ´key´ Soldado miss|
|Everton 3 Young Boys 1 (7-2 agg): Tormentor-in-chief Lukaku on song again|
|Serie A games to start late in show of support for Parma|
|Mancini irked by mistakes despite win|
|Besiktas 1 Liverpool 0 (aet, 1-1 agg, 5-4 pens): Lovren misses decisive spot-kick|
|Chelsea agree record sponsorship deal|
|Fiorentina 2 Tottenham 0 (3-1 agg): Gomez and Salah eliminate Spurs|
|Inter 1 Celtic 0 (4-3 agg): Guarin stunner sees Mancini´s men through|
|Manchester United v Sunderland: Poyet eyeing another Old Trafford upset|
|Monk has no problem with Van Gaal|
|Borussia Dortmund v Schalke: Di Matteo buzzing ahead of derby debut|
|Poyet not prepared to risk returning duo against United|
|Sherwood seeks six wins for survival|
|Championship Preview: Neil relishing East Anglian derby|
|Newcastle United v Aston Villa: Carver praises rejuvenated visitors|
|Granada v Barcelona: Catalan giants aiming to put pressure back on Real|
|Burnley v Swansea City: Monk targets 40 points in record time|
|Stoke City v Hull City: Meyler focused on maintaining resurgence|
|West Brom v Southampton: Pulis warns of continued dogfight|
|Police identify Chelsea fans over racist chanting|
|Guardiola warns against complacency|
|West Ham v Crystal Palace: Allardyce wary of being caught on counter|
|Parma GM compares club to the Titanic|
|Alderweireld close to Southampton return|
|Dyche keen to move on from Barnes furore|
|Gutierrez in Newcastle squad for Villa clash|
|Union chief urges action over Serbia gun threat|
|Berahino doubtful for Southampton clash|
|German citizenship? Why not? - Ribery|
|League Two Preview: Bury hope winning environment rubs off, Burton host Newport|
|Klopp hoping to avoid any nasty surprises after bomb discovery|
|Blackett pens new United deal|
|Sakho to return to training|
|Flores quits Getafe for personal reasons|
|Busquets agrees new Barcelona deal|
|Martino ´could not be happy´ at Barcelona|
|Allardyce striving to develop more Nobles|
|Nani hopeful of United return|
|Unexploded bomb found near Dortmund stadium|
|Lippi leaves Evergrande for personal reasons|
|Chelsea issue cup final warning to fans|
|Ancelotti has no intention to re-sign Morata|
|Dunkin´ Donuts sorry after Liverpool fans slam alternate club crest|
|Noble signs new West Ham contract|
|Sterling hopeful of contract resolution|
|Ali renews UAE contract|
|Deportivo Saprissa 0 America 3: Visitors win with late blitz|
|Copa Libertadores Review: Pato´s streak continues|
|Chievo v Milan: Abbiati wants consistency from Inzaghi´s men|
|Valverde wants momentum ahead of ´crucial´ week|
|Deila challenges Van Dijk, Denayer|
|Serie A Preview: Roma in crucial clash with Juve, resurgent Inter at home|
|Prince Albert: I feel for Wenger|
|Jardim salutes Monaco´s game plan|
|Schmidt dreaming of UEFA Champions League quarter finals|