Ivan Perisic cancelled out Stephan El Shaarawy's stunner as Inter protected their six-point lead over Roma in a 1-1 draw at San Siro.
Victory for either side would have given a new complexion to the scramble for top-four places but the Nerazzurri did neighbours AC Milan a favour by eking out a well-earned draw.
Croatia international Perisic netted seven minutes after Mauro Icardi's second-half introduction to hold Claudio Ranieri's men, who took an early lead through playmaker El Shaarawy's 14th-minute arrow.
Roma's inability to see out the result means they remain a point adrift of the fourth-placed Rossoneri, who earlier settled for the same scoreline at Parma.
Lautaro Martinez replaced the benched Icardi in attack and forced Antonio Mirante to turn a header against the upright in the eighth minute.
Perisic fluffed the follow-up to that chance and soon received a lesson in composure from El Shaarawy, who cut inside two defenders and brilliantly fired beyond Samir Handanovic.
Federico Fazio then produced a crucial last-ditch challenge on Matias Vecino, before Danilo D'Ambrosio nodded wide at close range.
Inter were given a reprieve of their own after the restart when Lorenzo Pellegrini failed to find the target at the end of a quick break.
Ex-Giallorossi boss Luciano Spalletti turned to Icardi in the 54th minute but it was an unmarked Perisic restoring parity in the 61st minute, making amends for his earlier miss by heading in D'Ambrosio's cross.
Martinez volleyed over with the chance to add a quickfire second and the spoils were shared after Inter captain Handanovic parried away Aleksandar Kolarov's late opportunity, the left-back stumbling under a nudge by Keita Balde.
What does it mean? Nerazzurri preserve status quo
Inter took a handy lead over Roma into this match but, with Juventus their next opponents, knew they had to avoid defeat to stay in pole position for third spot.
A draw will do, even if the time they spent in the attacking third might have warranted more than a point.
Fazio unfazed against Inter attack
Greater responsibility fell on the experienced Fazio's shoulders following defensive partner Kostas Manolas' pre-match withdrawal.
The 32-year-old stepped up for Roma, marking his 100th appearance with a performance that included 10 clearances, while little blame for the equaliser can be apportioned to a player who was busy grappling with Icardi.
There is no doubting Cengiz Under's ability as a player but this was not his most memorable match.
The talented attacking midfielder made just eight passes and lost each of his six duels before being replaced by Nicolo Zaniolo at half-time.
Key Opta Facts
- Inter have failed to win three successive league home games in a single Serie A campaign for the first time since February 2018.
- El Shaarawy has scored 10+ goals in a single Serie A campaign for only the second time in his career (after the 16 goals scored in 2012-13 with AC Milan).
- El Shaarawy has scored six goals in his last seven Serie A appearances at San Siro.
- No defender has provided more assists than Danilo D'Ambrosio in Serie A this season (five).
Inter entertain freshly minted Scudetto winners Juventus next Saturday, the same day as Roma's clash with Cagliari at Stadio Olimpico.