The 32-year-old midfielder has signed a deal through to June 2020 and says his position as a role model to younger players feels strange but is one he is adapting to.
"It’s a new part of my life," the Brazilian told CityTV. "Since I was young, my friends were all older than me so I was always the young guy and now it’s different.
"I’m one of the senior guys. But my whole life I have tried to speak less and watch more, observe more, to learn more.
"All the things I have learned through those years I have tried to teach to others and help them to achieve another level, to make them better players, to help them to achieve their targets."