"I was very emotional when I came on," Cavani told L'Equipe. "I heard the supporters singing my name.
"I was very motivated. It's a new adventure for me, a new phase of my life. I will give everything, like I have done in the past for every club I have played for.
"The PSG project is a great motivation and me a great desire to win everything."
PSG drew 1-1 with Montpellier yesterday as they begin the defence of their Ligue 1 title.