Juve have struggled under Pirlo in the first weeks of the season.
“Anyone who knows the Bianconeri world will tell you Pirlo is the right man," said Marchisio.
“He needs patience, the club knew that and he must not just be talked about as the new Juve coach, but as a new coach in general. He has just started, but has the ideas to leave his mark. He is leading the team to beat and among the top clubs Juve are the only ones to have made such radical changes.
“Considering there was no real pre-season due to COVID, it wasn't possible for Pirlo to even have the usual time for training. The problems seen against Barcelona are not reassuring, but I try to keep it all in perspective: the group will improve, even more when the big names return.
“The gamble wasn't hiring Pirlo, but choosing to make such a radical change during a difficult period."