Phil Jones had a baptism of fire - at least in terms of the temperature - as he made his first appearance for United following his summer transfer from Blackburn Rovers.
The baking-hot conditions in Chicago provided a stern physical test for the English champions, who started with Jones and his England Under-21 team-mate Chris Smalling at the heart of the defence. The 19 year-old new signing was eventually replaced, by Nemanja Vidic in the 75th minute, as Sir Alex Ferguson wisely refrained from deploying any outfield player for the full match.
"It was tough, very tough to play in heat like that, I struggled to breathe at times," Jones admitted to MUTV's David Stowell after United's 3-1 win over Chicago Fire.
"It was tough, very tough, but I still enjoyed it, being out there with the lads for the first time and I'm pleased we won.
"It just shows what the lads are about and what they're capable of to come back [from 0-1 down] in such a tough game. They [Chicago Fire] were a good team, they popped it around well. So credit to our lads, including all those who came on in the second half."
Fellow new-boy David de Gea was the only man to play the entire 90 minutes for the Reds and the young Spanish goalkeeper "did well" according to Jones, despite not being able to speak English to his back four.
Jones now feels like a fully-fledged United player, having got some game time under his belt. "It's always nice to put the shirt on for the first time and as I've said previously, I feel at home now."