Inter midfielder Hernanes wanted to show Lazio president Claudio Lotito he was wrong to sell him, firing his new team to a 2-1 win on Sunday.
Hernanes struck twice after Antonio Candreva had put hosts Lazio ahead, seeing Inter to their win at Stadio Olimpico.
"I feel bad for the fans but I wanted to show Lotito he was wrong after he said he did a great deal when he sold me," he told Sky Italia.
"I feel physically much better now and I realise I can make the difference playing behind the strikers. These two factors make me feel more comfortable than ever."
"It was a special match and I wanted to put in a great performance," Hernanes said.
"I wanted to show the Inter supporters that I'm better now and that the real Hernanes wasn't just the one we saw in a Lazio shirt."
