The recent signing from Benfica pointed to a video Mourinho showed his players, highlighting the weaknesses in Manuel Pellegrini’s side.
“We prepared very good, the coach showed us some videos of Manchester City and of course they were the right videos to show the quality but also where they make mistakes,” said the midfielder, who was awarded the man of the match on his full Premier League debut.
“We cannot say what [exactly] we prepared because it is only for us, but the preparation was very good and a big quality.
“To play in a game like this he [Mourinho] prepared us very good, like you saw on the pitch. Everyone knew what they were meant to do which is why we got the result.”
A first half strike from Branislav Ivanovic allowed Mourinho’s men to draw level with City on 53 points, and close the gap on league leaders Arsenal to just two points.
“We played good football, we played very well and the team was at the top level. We won and we deserved to win,” added the 25-year-old.
“It was very important for us, we have more confidence after that because it is not easy to play Manchester City. They are strong and they play quickly, but we can prepare against every team.
“We scored one goal, but we could have scored more. We had great opportunities, and sometimes one goal is enough to win.”