The matches between title-chasing Inter Milan and Sampdoria, Atalanta against Sassuolo and Hellas Verona versus Cagliari have been pushed back to avoid the spread of coronavirus.
Ashley Young's first Serie A goal for Inter Milan went in vain as Lazio came back from behind to win 2-1 at the Stadio Olimpico.
Juventus will now be favourites to finish the job in the second leg at the Allianz Stadium next month, with a final against either Inter Milan or Napoli up for grabs.
Inter Milan pull level on 54 points with Juventus but are ahead of the champions on goal difference thanks to a thrilling second half turnaround.
Cristiano Ronaldo found the back of the net again but Juventus paid for defensive errors in their shock loss to Hellas Verona.
Juventus bounced back from last weekend's defeat to Napoli with a 3-0 win over Fiorentina.
Cristiano Ronaldo makes an annual income of 48 million euros from his sponsored Instagram posts which is way more than what he gets from Juventus.
Maurizio Sarri complimented Cristiano Ronaldo's mother as the Portuguese star extended his scoring streak in a 3-1 win over Roma to advance to the Italian Cup semi-finals.
Juventus have a four-point cushion on Inter, who have won only two of their last six league games, and are now also under threat from Lazio.
Gennaro Gattuso replaced Carlo Ancelotti at Napoli last month, but the former AC Milan boss has lost four of five games since then.
Inter Milan are two points behind Serie A leaders Juventus with promoted Lecce offering 50-year-old Antonio Conte a chance to take home three points.
Serie A: Lazio vs Napoli match seemed headed for a goalless draw but all that changed with eight minutes remaining.
Cristiano Ronaldo scored his first Serie A hat-trick to lift Juventus top of Serie A, while Zlatan Ibrahimovic failed to inspire AC Milan on his return.
Cristiano Ronaldo's towering header for Juventus against Sampdoria in a Serie A match is one of the images of sports in 2019.
Sebastiano Esposito put away a second-half penalty which made him the youngest Inter Milan scorer since Mario Corso in 1958.
Cristiano Ronaldo sailed through the air to head home a goal against Sampdoria during their Serie A contest on Wednesday.
Sampdoria vs Juventus: Cristiano Ronaldo met Alex Sandro's looping cross with an incredible leap and header just before half-time.
Champions League Draw: Liverpool and Manchester City have testing knockout engagements as they face Spanish giants Atletico Madrid and Real Madrid respectively.