Haaland was speaking after defeat to AC Milan in New York.
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He later said, . "I have improved in many aspects. I am trying to become a better version of myself, both on and off the pitch.
"I have already said on several occasions that I can improve in many areas. I am working on it. I hope to be a better footballer and a better human being this season.
"You have to think about it day by day, without looking too far ahead, because there will be more than 70 games if I play them all, plus the international games. It's about trying to do well in every game , because this is my job."