"I think that after the Coppa Italia there was a lack of respect for my team," Garcia told Sky Sport Italia.
"Tonight we proved that we are strong. You all know there was a lack of respect. People need to acknowledge what this team can do and say the truth. I have total faith in this team and I think I am right to do so."
The game was played with the Curva Sud and Curva Nord closed after anti-Neapolitan chants broke 'territorial discrimination' rules.
"It was also a little strange to play in a stadium like this. There was nothing positive around the team beforehand, so I put forward this result, this performance, these three goals and an iron defence.
"When I say everything was negative around us, I include the fact we were playing against a Sampdoria side that plays good football and came out attacking us from the start."
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