"It's harder here but I will get used to it. It is something new for me," he said.
"The referees don't whistle for everything here - in the Bundesliga every small contact is a foul.
"The coach (Roberto Mancini) says to me it is different in Italy and Germany as the referees whistle everything.
"I hope I can get used to it, and have to get stronger. I have to play stronger.
"In some situations in Germany where I am not so strong it is no problem but in England it is different. You have to fight for every ball.
"I am okay mentally. When I don't score for two or three games and then lose the ball I always keep my head up."
"We showed in the second half how we (he and Tevez) can play together and also in the first half I played well with Mario and we understood each other," said the 24-year-old.
"Everyone could see it. Communication is important and when you have an understanding with someone on the pitch it is the most important thing.
"Carlos has been here a long time and I am the one getting used to everything, so when I settle we will all play much better.
"I know I can play much better and I will work hard and show people.
"Strikers are expected to score and I have two goals in eight games.
"When you see this, you can think it's not good, but I try to work also for the team, not just to try to score.
"I try to assist team-mates. I am not a player who stays on the edge of the box and waits for a chance."