The Brazilian marked his first appearance for Walter Mazzarri's men with an assist, admitting it was an emotional experience for him to run out at San Siro as a Nerazzurri player
The Brazilian sealed a deadline day move to the Nerazzurri from Lazio, but did not feature in last week's 3-1 loss to Juventus in Turin.
However, he made his bow for his new club at San Siro and set up Walter Samuel's winner.
"I was a bit agitated in the build-up to this game, I was desperate to play and make my debut. The best thing about today of course is that we won, I'm very happy with how it went," he told the club's official website.
"We created lots of openings and could have taken the lead earlier, but then we scored a great goal.
"I'm especially pleased because it came from a corner we'd rehearsed. I spent quite a bit of time working on them during the week.
"It was an emotional experience to play at San Siro. The pitch was in excellent condition. It's a bit faster than the Olimpico because the grass is a bit shorter.
"The stadium is magnificent, as always – the best I've played in. It will always be a pleasure to play here.
"What's Inter like on the inside? Fantastic. I've been welcomed really well by everyone. The people who work here are all really nice folk, so I'm even happier with my decision to join."