Juve trail Inter with 11 games of the season remaining after losing 2-1 at Napoli on Sunday.
Napoli's crisis deepened on Saturday after being held to a 1-1 home draw by Genoa.
Defending Serie A champions Napoli saw their non-winning league ways continue Friday with a goalless draw against mid-table Monza
Juventus took advantage of Atalanta's goalless draw at Genoa with a 2-0 win over Cagliari which inched them closer to Serie A's Champions League places, as Salernitana's trip to Udinese became the season's first coronavirus-related casualty.
Andriy Shevchenko got his first win as Genoa coach on Tuesday with a 1-0 success over Salernitana booking an Italian Cup last 16 clash against his former club AC Milan.
Inter Milan kicked off their Serie A title defence by cruising past Genoa 4-0 on Saturday in an encouraging display from the champions.
Serie A: Inter Milan coasted past Genoa to register their fifth win in a row and also push for their first league title since 2010.
Serie A: Cristiano Ronaldo scored a pair of penalties in his 100th appearance for Juventus in the club's 3-1 win over Genoa on Sunday.
Cristiano Ronaldo headed in the equaliser in the 69th minute for Juventus to avoid handing new coach Andrea Pirlo a first defeat.
Lecce lost 3-4 at home to mid-table Parma but would have dropped down to Serie B even if they had won as relegation rivals Genoa thumped Hellas Verona 3-0.
Inter Milan pulled back ahead of Atalanta, and within four points of leaders Juventus, who are poised to claim a 36th 'Scudetto' when they play Sampdoria.
Sebastiano Esposito put away a second-half penalty which made him the youngest Inter Milan scorer since Mario Corso in 1958.
Juventus, who beat AC Milan 2-1 on Saturday, needed Napoli to lose to win the Serie A title for the 35th time.
Italy were held 1-1 by Ukraine in an international friendly in Genoa during which the victims of the bridge collapse in the city were remembered.
Edin Dzeko was sent off 16 minutes before the end but teenager Sadiq Umar sealed the match late on to end a seven-match winless run for AS Roma that included Wednesday's Italian Cup exit against second-division Spezia.
Roma had Daniele De Rossi and Leandro Castan sent off to end their 17-game unbeaten run.
Carlos Tevez fired Juventus into the lead in the sixth minute but Maxi Moralez's strike saw Gianluigi Buffon's unbeaten streak end at 744 minutes.
The sides' final Group B clash at the Ali Sami Yen Stadium was stopped in the 31st minute with the scoreline 0-0, as increasingly heavy snowfall made playing conditions nearly impossible.