Gianluigi Buffon proved his worth to Juventus in their vital win at Napoli on Wednesday, but Andrea Pirlo will restore Wojciech Szczesny as his first-choice goalkeeper.

World Cup winner Buffon, now 43, is firmly behind Szczesny in the pecking order in Turin, yet he was given a rare opportunity for the huge midweek Serie A match.

The veteran, who returned to the club from Paris Saint-Germain in 2019, made three saves as strikes from team-mates Cristiano Ronaldo and Paulo Dybala set the Bianconeri on their way to victory.

Only a 90th-minute Lorenzo Insigne penalty denied Buffon a clean sheet as Juve moved three points clear of their opponents, who sit in fifth - just outside the Champions League places.

But Buffon should not expect to reprise this starting role on a regular basis, despite Szczesny committing an error leading to a goal in the weekend draw with city rivals Torino.

"I had already spoken to the lad [Szczesny]," said Pirlo, who had suggested earlier in the week Szczesny would play.

"He was already tired when he was back from the national team because he had played three games in a row, so he needed some mental rest and to recover his energy.

"It was already in my mind to have Gigi play, but [Szczesny] remains the main goalkeeper of Juventus."

Even besides the mishap against Torino, Buffon's output since returning to Juve has been more than a match for the number one.

Among goalkeepers in Europe's 'top five' leagues to play 25 games or more in all competitions since the start of last season, Buffon's save rate of 80.2 per cent trails only Sevilla's Yassine Bounou.

None of these keepers have conceded fewer goals than Buffon (18), while again Bounou is the only man conceding fewer goals per game (0.7 for Buffon).

With 11 clean sheets in 26 outings, he ranks ninth for clean sheet percentage (42).

Meanwhile, discounting penalties and own goals, Buffon has conceded 14 times over the past two seasons despite having an expected goals on target (xGOT) conceded total of 17.1, meaning he has prevented 3.1 goals.

This season alone, among goalkeepers to play 10 times or more, Buffon again ranks second for save percentage, his 81.8 this time trailing Sergio Rico.

Across the past two campaigns, Szczesny has saved 72.7 per cent of shots he has faced, but has conceded on average 1.1 goals per game and collected a clean sheet in just 31 per cent of his appearances.

He has prevented 7.7 goals - with a 66.7 xGOT conceded versus 59 non-penalty goals - albeit having played 68 matches, 42 more than Buffon.

In 2020-21, Szczesny has conceded a goal per game and kept out 71.3 per cent of shots on his goal.

With Buffon set to again lose his place despite remaining at the forefront of the European game, it would support Gianluca Pagliuca's suggestion the Juve great should have retired rather than return to Turin to sit on the bench.

Pagliuca told Stats Perform News: "If I was him, I have already retired. I would have retired after PSG. It was a good idea to go to Paris because it's a big club and he was playing regularly.

"Buffon on the bench? Happy to play only in Coppa Italia? It's not great.

"Someone with his career, it's better to retire when you are 41 and you are still playing than having a couple of years on the bench. He is still a really good goalkeeper.

"The best thing was to retire after PSG, considering his career. Maybe he still wants to compete. However, we have to think he's been the best goalkeeper in the football history."

Andrea Pirlo warned his Juventus side they risk going the way of Real Madrid and Bayern Munich if they take SPAL lightly in Wednesday's Coppa Italia quarter-final tie.

SPAL knocked out Sassuolo in the last round and make the trip to the Allianz Stadium sitting fifth in Serie B as they seek a swift return to the top tier of Italian football.

Record 13-time Coppa winners Juve enter the game as strong favourites to progress to the semi-finals, where the winner of Tuesday's game between Inter and Milan would await.

However, in a month that has seen Madrid exit the Copa del Rey with defeat to third-tier Alcoyano and Bayern lose to second-tier Holstein Kiel in the DFB-Pokal, Pirlo is taking nothing for granted.

"There are a lot of possible risks because we are facing a Serie B team on paper. But if you look at the foreign cups, Bayern lost to a team from a lower division, as did Madrid," Pirlo told Juventus TV.

"We have to assume that it will be a difficult game. We need maximum concentration because we want to go through. They are a good team that are doing well in the league and cup.

"We of course have to be careful because the main objective is to pass through to the next round.

"They are a very good team that like to play football, play with three defenders and sometimes three forwards or half-strikers. It is a difficult team to face so we will have to be at our best to avoid losing."

Juve's Scudetto hopes took a major dent with defeat to Inter on January 17, but they have since responded with 2-0 wins over Napoli in the Supercoppa Italiana and Bologna in the league.

Pirlo now has near enough a fully-fit squad to choose from and believes that will be reflected on the results front.

"It means we can improve because we have great players back," he said. "I hope to finally have the whole squad available and we can then work on all the concepts, which we have not been able to do this season."

Rodrigo Bentancur will miss the cup tie but Matthijs de Ligt and Merih Demiral will return to the starting line-up after recovering from coronavirus and injury respectively.

"Bentancur will rest for sure because on Sunday he played the whole game with a hole in his foot," Pirlo said. "We had to put three stitches in - he made a big sacrifice and now he will need a few days of rest to absorb the bruise.

"Some players who played on Sunday will rest. De Ligt and Demiral will return and start from the beginning. Then for the rest we will have a competitive team.

Pirlo also confirmed Gianluigi Buffon will start against SPAL, with regular goalkeeper Wojciech Szczesny being given a breather.

Szczesny has conceded 16 goals in 14 league matches this term for a save percentage of 68.63, which is below the 74.42 he managed last season and 75.61 in 2018-19.

He made three saves against both Napoli and Bologna to keep successive clean sheets, but Pirlo is after even more from the Poland international.

"He is giving us great confidence with his performances," the rookie head coach said. "We are more than satisfied with the displays he is putting in on the pitch.

"We know he can still improve because he's a world-class goalkeeper who plays for a great team. We are hoping that he can still do better."