The 25-year-old has failed to score in his last five games for the Bianconeri and Italy, having found the target twice in Juve's 4-1 victory over Udinese in the first week of September.
"He has great qualities that should not be called into question," Andrea D'Amico told TMW.
"What we must remember is that he hasn't really had a break since Euro 2012. If he plays some below-par games, then that shouldn't set alarm bells ringing.
"He'll be able to rediscover the right intensity with Juventus. The problem is that in Italy everything is looked at with a magnifying glass.
"If things go well then the player is hailed, while he'll immediately get kicked off the pedestal when things go wrong."
Giovinco rejoined Juventus from Parma in the summer.