Alvaro Morata says the Premier League is far more fast-paced than La Liga or Serie A, describing the football as "on fire".
The striker arrived at Chelsea for a club-record fee from Real Madrid and is already impressing with three goals in his opening four games in England's top flight.
Morata comes with a pedigree of scoring, having hit the back of the net 29 times for Real Madrid and a further 23 at Juventus.
The Spain international notes how the best teams in the Premier League have a far sterner defence than to which is he used to but feels he is adapting well.
He told the club's official website: "At the moment, I’ve only scored and assisted with my head for Chelsea, so I hope to use my feet as well soon!
"But it’s true that English football is different to Italy and Spain. You don’t have much time to calm down, or relax, because all the time the ball is on fire!
"You need to be in good condition to play here and approach every match with a good mentality.
"In terms of the marking, it is probably the same here as in Italy with the teams that are maybe not at the top of the league – those teams are compact and it’s hard for us sometimes to break them down.
"But when the other team wants to play with the ball, you can find space. That’s when you find the spaces to attack the other team."
Chelsea returned to the Champions League on Tuesday after a year absence, putting six past Qarabag in a comfortable win.
Morata, who won the competition twice with Real Madrid and reached the final with Juve, is confident the Blues can go far this season as long as they approach the games with the right attitude.
"It’s an incredible competition," Morata said. "With all the teams I’ve played for in the Champions League I have reached the final and I hope to do so this year too.
"It’s very difficult to win the Champions League but I think we have a good team, and with a good mentality we can do good things."
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