Juve clinched a 3-1 win at the Allianz Stadium on Saturday thanks to Alvaro Morata’s second-half brace and a first-half Adrien Rabiot goal.
The victory saw Pirlo’s side close the gap on Serie A leaders Inter Milan to seven points with 13 matches of the 2020-21 campaign remaining.
Eyebrows were raised when Ronaldo – who is enjoying another superb season, scoring 31 goals in all competitions – was only named on the Juventus bench, but Pirlo says it was a pre-arranged decision.
‘It came from eight or nine consecutive games, we reached an agreement during the week,’ Pirlo said. ‘It was already scheduled.
‘Cristiano is an added value, the boys have done what they had to do. Cristiano has already scored 20 goals, it was normal that they also scored the others.
‘When you give the ball to him something can always happen and often you start 1-0 up. He is fine.
‘This rest was agreed during the week because he had played so many consecutive games and needed to rest.’
On Juventus’ win over Lazio, Pirlo added: ‘We got off to a bad start by making a mistake with a back-pass but we didn’t let our heads drop.
‘We had limited options but this match was like a final and everyone toiled for the team including those playing out of position.
‘It’s never easy to come back after going behind, especially against a team like Lazio, but I was really happy with our reaction tonight.’