In his 2nd season for Juventus, 2000-01, Zambrotta made 29 league appearances and scored 3 goals. But Juventus finished once again on the 2nd place. Zambrotta won his first scudetto in the season 2001-02, while he made 32 league appearances and scored 1 goal throughout the season.
After Zambrotta suffered an injury in the game against South Korea during the 2002 FIFA World Cup, he missed the beginning of the season 2002-03. During his absentation, the new signing of Juventus Mauro Camoranesi took his place on the right wing and was in superb form. This prompted the coach Marcello Lippi to switch Zambrotta to the left-back when he returned to action. Zambrotta was adapted to his new position very quickly and performed particularly well. He remained a regular first team player as Juventus won the 2nd consecutive scudetto and reached the UEFA Champions League final, in which they were defeated by Milan in the penalty shoot-out after a 0-0 draw.
Zambrotta has won three scudetti with Juventus as of 2005, making a total of 185 league appearances and scoring 7 goals in 6 seasons. In 2005-06, following the injury of Zebina and the arrival of Chiellini, Zambrotta is again switched to the right-back by the coach Fabio Capello. In 2005, Zambrotta extended his deal with Juventus again which will keep him in the black-and-white jersey until 2010.
I've added his missing sets. The Milan one was heavily worked so it's reliable. Don't know so much about the Barça one since it's mostly a downgrade of his prime one, and I can't judge so much his spaniard adventures since I didn't followed FCB in that period.. I just remember that he wasn't so praised by the press and did some really dumb mistakes in defence, but he was more or less a regular starter.