Roma coach Jose Mourinho took aim at AC Milan after defeat on Thursday night.
The Inter Milan Treble winner was jeered by home fans during Roma’s 3-1 loss.
“I was offered the job three years ago. I thought about it for three days, but I am so happy to have taken that decision,” said Pioli.
“I am a professional, but there is still space for emotion. I am passionate about Roma and I will give everything for this club.”
He added: “Looking to what happened today, I am twice as happy about my decision,”