Rejuvenated Morata leads the line for the champions having left behind the bench at Real Madrid in the summer.
He said: “I came to Chelsea because one club and one coach believed in me. Now I have all of these things and I’m very happy. It’s the most important thing.
“It’s always a difficult challenge. It’s the most competitive league in the world. Yes, it’s physical. And it’s the league with the most teams who can win the title.
“There are strong teams. And we’re very happy because we’re fighting for the Premier League, too.”