Liverpool boss Jurgen Klopp was unhappy with the conditions after their 3-2 defeat to Borussia Dortmund in Indiana.
Harry Wilson and Rhian Brewster scored for the European champions but goals from Paco Alcacer, Thomas Delaney and Jacob Bruun Larsen were enough for Dortmund to take a deserved 3-2 win at the University of Notre Dame.
The game was played in temperatures of 33C - in a ground hosting its first football match.
"You could see that Dortmund are a step further in their preparations but there was a lot of good things for us as well," he said.
"How we conceded goals was a lack of organisation, but it is very difficult to have that at this stage.
"Really I learned nothing. But it is difficult when the ball isn't rolling. It was a tough night for both teams - it was really warm.
"I don't like what I see in a game in pre-season very often but there is always a reason for it. I am not over the moon with our performance but I know there is lots to come."