The 25-year-old Serbian returned to Stamford Bridge in January, three years after leaving the Blues for the Portuguese outfit.
Despite admitting that it was difficult to uproot his family and bring them to another country, Matic is enjoying his time back in England.
"The day my agent offered me the chance to come back to Chelsea, I didn't hesitate for one second," he told A Bola.
"You can't refuse one of the best clubs in the world and the best coach in the world. But my wife and my three-year-old child cried when we left Lisbon.
"But in London I feel really great. I'm also working with a great manager, everybody knows that Jose Mourinho is a fantastic coach. Now I'm training under him every day I just must agree, he really is fantastic."
Matic has made 13 appearances for Chelsea during the current campaign.