After the loan expired, Juventus had a purchase option worth 40 million euros, which can be increased by one million euros through bonus payments. The eighth-placed player in the 2009/10 season also had a purchase option (three million euros) for 50 percent of the rights to the Italian, which he exercised on June 22, 2011. On September 21, 2009, he succeeded Angelo Gregucci as coach of Atalanta Bergamo, who started the 2009/10 Serie A with four defeats. In July 2006 he became coach at AC Arezzo in Serie B. The club started the season with six minus points due to the 2005/06 Italian football scandal and only got five points from the first nine games of the season. In May 2012, Conte's apartment was searched by police and an investigation was opened against him on suspicion of complicity in gambling fraud during his time at AC Siena. Even though there were no official champions at this time, an unofficial championship was played in 1944 in which the AC Spezia team, which was reinforced with players from the local volunteer fire department, was able to win the title. In his first season, his team became undefeated Italian champions and reached the final of the Coppa Italia, which they lost to SSC Napoli.
In the 2019/20 Coppa Italia, Conte led his team to the semi-finals, where they were eliminated by eventual winners SSC Napoli. In the following eight games there was only one win, one draw and six defeats, which is why Conte resigned on January 7, 2010 after a 2-0 home defeat against SSC Napoli. On May 23, 2010, he became head coach of AC Siena, succeeding Alberto Malesani. On October 16, 2007, after lengthy negotiations, Del Piero extended his contract, which was expiring in 2008, until June 30, 2010. He then belonged to the regular lineup until the end of the season. With his 21 goals this season, he helped Juve to third place in Serie A and secured the title of top scorer ahead of his strike partner Trezeguet. On April 6, 2008, Del Piero played his 553rd game in Juve's uniform, breaking Gaetano Scirea's club record. The following two seasons (1999/00 and 2000/01) were mixed, Juve narrowly missed the championship and were eliminated early in the European Cup; In the 2000/01 season, Juventus Turin failed in the group phase of the Champions League against Hamburger SV, Panathinaikos Athens and Deportivo La Coruña and was eliminated as bottom of the group.
In the 2001/02 and 2002/03 seasons he contributed 16 goals to winning the championship. Del Piero scored 14 and twelve goals respectively as a substitute in the two seasons. He scored 21 goals in 32 league games and also 10 goals in 10 games in the Champions League, in which they only lost to Real Madrid in the final. According to the UEFA five-year ranking, Serie A is one of the most important European leagues, along with the English Premier League, the Spanish Primera División and the German Bundesliga. Del Piero was captain of the team again and led the team to win Serie B and thus direct promotion. In the 2013/14 season, Del Piero was the team's new captain. He took over the team in ninth place in the table, five points behind the Champions League places. Four more league games followed and at the end of the season he took second place in the championship with the team in Série A – just three points behind champions FC São Paulo. He scored his first goal for Albania against the Italian U-21 team. He made his debut on the 16th. January 1991 in a friendly match against Spain that ended in a draw.
During his active career he was under contract with clubs in Denmark, Germany, Spain, Italy, England, juventis jersey France and the Netherlands. He signed a two-year contract. In 1929/30, Inter became the first champions of the newly founded all-Italian professional league, the direct predecessor of Serie A. The championship team's squad included the legendary Giuseppe Meazza, who had already joined Inter two years earlier. After Del Piero's strong performances in the second half of the 2007/08 season and winning the top scorer ranking, Donadoni finally called him into the squad for the 2008 European Championships in Austria and Switzerland. On November 29, 2008, he converted a penalty in the league game against Reggina Calcio, scoring his 250th goal for Juventus. On the 8thIn November 1998 he tore a cruciate ligament in his right knee in the game against Udinese Calcio and was out for nine months. He was awarded the league's best new player, the MLS Newcomer of the Year Award, in November 2015. Del Piero was named best player of the World Cup final. On March 13, 2007, he was hired again as Maurizio Sarri's successor and the team narrowly missed staying in the league.