Manuel Pellegrini's men suffered their first home Premier League defeat of the season on Monday thanks to a single Branislav Ivanovic goal as Chelsea ran out 1-0 winners.
The victory means that the west Londoners moved level with Manchester City in the table, two points behind leaders Arsenal, and Matic says that the boss must take credit for the win.
|21/10||Chelsea are 21/10 with Paddy Power to win the Premier League|
"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 [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."
Chelsea also hit the woodwork three times in the game and the 25-year-old feels that the Blues could have won by an even greater scoreline.
"We played good football, we played very well and the team was at the top level. We won and we deserved to win," he added.
"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."