Juventus knew exactly what they were getting when hiring Andrea Pirlo and would be wrong twice if they decided to make a change now, according to Fabio Cannavaro.

Despite winning Serie A for a ninth successive season, Juve reacted to the team's shock Champions League exit to Lyon last year by sacking head coach Maurizio Sarri.

Pirlo was promoted from within to the top job, the former Italy international - who had only just been appointed as the club's new under-23 boss - signing a two-year deal to take charge of the first team.

His debut campaign has been tough, both at home and abroad. Juve's dominance in the league looks set to come to an end, while their hopes of European glory were dashed again at the last-16 stage, this time unexpectedly losing over two legs to Porto.

Pirlo's position has come into question as a consequence, yet former team-mate Cannavaro insists the club must show faith in the decision they made to appoint him in the first place.

"When Juve chose Andrea they knew very well that he had no experience," Cannavaro said in an interview with La Gazzetta dello Sport

"It is logical that he should have his time to mature, even in the relationship with the team. There are still 30 points at stake, so it is right to leave it.

"And he did good things, throwing young people and managing a complicated dressing room, one full of people who have won a lot. Of course, some things don't work, he was wrong: he is a human.

"It's a heritage that must be protected. After all, if Juve don't confirm his position, what did they choose him to do last summer?

"They would be wrong twice if they take that decision now. And the blame can't only be his if the players make mistakes on and off the pitch."

Pirlo's Juve have a 57.14 per cent win percentage in Serie A, having scored 56 goals and conceded 25. The team averages exactly two points a game, considerably lower than the 2019-20 season.

They face a fight just to qualify for the Champions League again: Saturday's 2-2 draw against Torino saw them slip to fourth in the table, with a crucial home game against Napoli - who sit fifth, albeit level with Juventus on 56 points – to come on Wednesday.

As for Sarri, his solitary campaign in charge averaged out at 2.18 points per game, the former Napoli and Chelsea boss winning 68.42 per cent of his league fixtures as he secured the title again.

However, both slip below the lofty standards set by Massimiliano Allegri in his final year in the job. In 2018-19, his squad won 73.68 per cent of their Serie A outings, conceding just 30 goals as they picked up points at a rate of 2.37 per game.