The 31-year-old's milestone and a hard-fought win prolonged the celebrations for Juventus, whose handicap for match-fixing was cut from 17 to nine points on Friday after a successful appeal.

Juve, who were thrown into the second division for rigging matches in the 2004-05 season, saw their points penalty reduced by the Italian Olympic Committee's Court of Arbitration.

Juve's win left them on 13 points, five points behind leaders Genoa who play on Monday.

Del Piero, in his 14th season with Juve, was overjoyed to reach his double century.

"I am very proud," he told Sky Sports Italia.

"It means a lot to me because I feel very attached to this city, the club and its fans. Not only that but my goal gave us an important victory."

Del Piero, who joined Juventus from Padova in 1993, broke the deadlock in the 73rd minute shortly after coming on as a substitute.

The World Cup-winning Italy international swept home the loose ball after Pavel Nedved's shot had come back off the post.

Gianluigi Buffon preserved Juve's lead with a superb one-handed save to deny Jose Castillo four minutes from time.

Juventus' initial punishment for their role as the main offenders in the Italian match-fixing scandal was relegation with a 30-point penalty.

The two points dropped by Juve this season were in a 1-1 draw at Rimini on the opening day of the season.

Juventus next play on Wednesday at home to Brescia.