The Bianconeri had taken the lead and seen Gaetano Berardi sent off after just 32 minutes, but a Mauro Icardi brace sealed the shock 2-1 result in Turin.
“I am not bursting with joy when I lose,” he confessed. “I struggle to absorb defeat and we will not look back fondly over this match. We had the advantage and deserved to be in front.
“This is a game that we must reflect on and will help us to grow up. It’s part of the maturation process for a young side, let’s put it like that.
“It is certainly irritating to lose on counter-attacks and we will analyse what we did wrong today. Juventus are only human, we are not martians.
“There are two tough months ahead of us and we’ve got to grit our teeth to give our all. We created a great deal in the second half, but were not particularly precise in our finishing.
“Sampdoria did well to close up, but were also a little lucky. We tip our hats to them, as it wasn’t easy for them to win here with 10 men and a goal down.”