Inter are without a win in four Serie A matches following a goalless draw with Lazio, leaving them seven points adrift of Napoli.
Inter's Scudetto challenge was dealt another blow as they had to cling on for a 0-0 draw against Lazio at San Siro on Saturday.
A fourth successive Serie A match without a win has seen Inter, who were the early pacesetters following a 16-game unbeaten run, slide to third, with the gap to leaders Napoli now standing at seven points.
It could have been even worse, too. Lazio thought they had been given a glorious opportunity to take the lead when official Gianluca Rocchi awarded a penalty for handball against Milan Skriniar in the second half, but that decision was overturned after he had consulted the video assistant referee (VAR) system.