Michael Carrick believes United are in good shape for the start of the Barclays Premier League campaign, thanks to the tests provided by the four games in the States.
The US Tour came to a close with a 2-0 defeat to Paris St-Germain in Chicago, ending the Reds run of three successive pre-season wins.
Carrick feels that United can take plenty from the encounter against the French champions going into the season's opener against Tottenham Hotspur at Old Trafford next weekend.
"It's all about Tottenham- that's what we've been saying and working towards since we got here- that's when the business really starts" the midfielder said.
"We've had some good games over here to get us ready.
"If the games are too easy you don't get enough out of them so the Barcelona game and this one have been good for us and we can take a lot into the Tottenham game.
"PSG are a very good team with some world-class players so it was a good test for us to see how fit we are and where we're at.
"I thought we played some good stuff at times and we were disappointed to go 2-0 down in the first half and then after that they shut us down and made it difficult for us to create anything.
"There were a few tired legs at the end of the game, with the heat and humidity, but it was a good workout for us."
Youngster Sean Goss was given a first taste of senior action when he came on for the final 10 minutes, replacing Carrick.
"It's always great to see the young players getting a chance and the opportunity for Sean to come away on tour was probably a bonus for him in many ways.
"So to come away and train, and then get 10 minutes at the end, is great for him and will probably make him even more hungry to succeed." Carrick added.