The midfielder left PSG earlier this year to sign for City.
He recalled to Onze Mundial: "I spoke with some players like Vincent Kompany. I had met him in the corridors when I visited the facilities.
"He told me: 'Here you have everything to learn, you have everything to gain, it's a great club, with great ambitions and a great coach'.
"I also spoke to (Mikel) Arteta on the phone. He knew how to convince me. He told me he was waiting for me impatiently. When someone like Arteta calls you, it makes a difference. He is still a gentleman who knew the high level and played in my position.
"He had the words to convince me. And today, I do not regret my choice."