Barzagli believes that Inter have the quality to challenge for the title this season.
"I am afraid of Diego Milito," he told Sky Sport Italia. "He is a complete striker – one of the strongest in Europe. He does not miss a thing.
"Inter are a worthy threat. The Nerazzurri can definitely challenge for the title, but we are a group that believes in itself."
The Italian international joined Juve from Bundesliga side Wolfsburg in January of 2011.