While Juve remain unbeaten in the league all season long, five draws in their last six games have seen them fall to second in the league behind AC Milan.
Their awful form continued on Wednesday when they were held to a 1-1 draw by mid-table Bologna, but Marchisio insists confidence at the club still remains high.
"We're two points off Milan and have gained a point on [third-placed] Lazio," Marchisio said on Juve's official website.
"The team's fine; we're still unbeaten, we run a lot and we kept our balance even when we went down to ten men.
"The squad is competitive and that's already been clear to see. We've got confidence in ourselves and in the group, this was also made evident [on Wednesday]."
Juventus are back in Serie A action on Sunday when they travel to Genoa, while Milan entertain Lecce.