“As the coach (Andrea Pirlo) keeps telling us, every game from here on to the end of the season — whether in Serie A, the Champions League or the Italian Cup — is like a final,” said Juventus winger Federico Chiesa, who set up Morata’s first goal.
The victory moved Juventus within one point of second-place AC Milan, which visits Hellas Verona on Sunday, and within seven points of Italian leader Inter Milan, which hosts Atalanta on Monday.
Juventus had won only one of its last four meetings with Lazio, including a 1-1 draw in November.
Lazio remained seventh.
Udinese moved into the top half of the table with a 2-0 win over Sassuolo, which is now one spot above the Friuli team. Fernando Llorente scored his first goal since joining from Napoli in January and Roberto Pereyra added another.
Also, Spezia and Benevento drew 1-1 in a matchup of two promoted clubs — helping both to stay clear of the drop zone.