Erling Haaland, a new signing for Manchester City, scored on his debut in a match that was delayed twice by lightning in Wisconsin.
Haaland scored in the pre-season friendly.
The 22-year-old missed the first match of the US tour due to injury.
The forward needs time, according to the boss.
Haaland's goal came from a whipped cross from Jack Grealish.
He scored a goal in front of the keeper and that is important.
We'll see how he responds to the naggings that he had in the past weeks.
We have a lot of time to prepare for every weekend game after we return. We will get the best form in a couple of weeks.
The match was shortened to 80 minutes because of two delays caused by lightning in the area.
Lambeau Field, home of the Green Bay Packers, was the site of the first soccer match to be played there.
After giving City the lead, Haaland looked as if he had made it 2-0 just before the break, but his left-footed shot from inside the area was ruled out for being in an ineligible position.
The Community Shield will be held at the King Power Stadium inLeicester on Saturday.