But David Trezeguet gave Juve breathing space for the second leg, reacting quickly after he had hit the post.
As Zidane struggles for fitness, France team-mate David Trezeguet claims the inspirational French midfielder had injury worries before the friendly with South Korea.
More poor marking allowed Trezeguet time first to fire a shot against the post, and then to smash the rebound back into the opposite corner.
Monaco striker David Trezeguet has been called up as cover for the recalled Christophe Dugarry, who has stitches in a head wound sustained in a league match.
French striker David Trezeguet put Juve ahead in the 35th minute against the run of play when he headed Zdenek Grygera's left-wing corner past goalkeeper Morgan De Sanctis.
Alessandro del Piero is also expected to stay, while coach Didier Deschamps says that Gianluigi Buffon, Zlatan Ibrahimovic and David Trezeguet will all remain at the Stadio Delli Alpi.
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Injuries have played a large role in Juve's troubles, with captain Alessandro Del Piero, Gianluigi Buffon, Vincenzo Iaquinta, David Trezeguet and Mauro Camoranesi all missing chunks of the season.
After Trezeguet's clever flicked header was pushed around the post by Mark Schwarzer, Diego's corner was met by the leaping Legrottaglie, who rose unmarked to send a powerful header bouncing into the roof of the Fulham net.
Despite their relegation in 2006, Juve managed to hold on to a core of their top stars, including strikers David Trezeguet and Alessandro del Piero, Gianluigi Buffon - rated the best goalkeeper in the world - and midfielder Pavel Nedved.
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The 10-week tournament features mostly Indian players, but also a number of "marquee" European soccer stars, admittedly out of their prime but still huge draws: former Juventus strikers Alessandro Del Piero and David Trezeguet, and former Arsenal attackers Robert Pires and Freddie Ljungberg.
French forward David Trezeguet equalized in the 23rd minute after Bari goalkeeper Jean-Francois Gillet could only block Diego's shot, but the hosts went ahead again just before halftime with a penalty from Paulo Barreto, who was tripped by Italy defender Fabio Cannavaro.
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