New Juventus president Jean-Claude Blanc was left angry after their collapse against Napoli on Saturday night.

Blanc was visibly shaken by the defeat as he saw Napoli president Aurelio de Laurentiis and his minders celebrating the amazing 3-2 win in front of him in the director's box.

"This difficult time can only be overcome by analysing what is wrong," said the patron. "It is necessary to find answers through hard work.

"Personally, I believe the real Juventus is the one seen on Wednesday against Sampdoria, but we have to raise the concentration level and keep it gritty until the final whistle."

On Saturday Juve were 2-0 up only to concede three goals in 23 minutes for their first home defeat of the season.

"We need to improve and have the quality to do so. The time for mistakes is over, we have no room for any more stumbles.

"It is November 1 and nothing is set in stone yet, but we have to lift our heads and keep pushing with this side, not run to the transfer market."