Inter moved back to second place in Serie A after Henrikh Mkhitaryan and Lautaro Martinez were on target in a 2-0 victory over Lecce on Sunday.
Simone Inzaghi's side underwhelmed in a 1-0 defeat to Bologna last weekend but produced a much-improved performance to return to winning ways at San Siro.
Mkhitaryan's first-half opener set Inter on their way before top scorer Martinez's 14th league goal of the season made sure of the three points in the second half.
Victory saw Inzaghi's men leapfrog Lazio and cut Napoli's sizeable advantage at the summit to 15 points after the Partenopei lost to Maurizio Sarri's side on Friday.
Hakan Calhanoglu stung the palms of Wladimiro Falcone, while Andre Onana kept out a low Assan Ceesay drive in an opening bereft of clear-cut chances.
Edin Dzeko headed narrowly wide from Calhanoglu's corner soon after, before Mkhitaryan delivered the first moment of quality for his 29th-minute opener.
The midfielder swept a right-footed finish from Nicola Barella's offload into the top-right corner after the Italy international evaded two challenges inside the area.
Martinez finished in similarly clinical fashion after 53 minutes, brushing Denzel Dumfries' low right-wing centre past Falcone to double Inter's lead.
Dzeko fired another presentable opportunity straight at Falcone and Alessandro Bastoni dragged wide as an insipid Lecce never threatened a late response.