Harry Maguire is set to join up with the Manchester United squad on Wednesday after missing the flight to Chicago on Tuesday to deal with a personal issue.
Maguire posted on social media to assure supporters he would be making the trip to the United States -- 24 hours after his teammates.
He said: "All is fine now. I will be travelling tomorrow [Wednesday] to meet up with the squad. Thanks for your concern."
As expected, Alejandro Garnacho, Antony, Jadon Sancho and Tyrell Malacia have been omitted while the club work on securing them moves away from Old Trafford.
Lisandro Martínez has been included in the squad, but the Argentina international will not train or play with the team during the tour.
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Martinez has been sidelined since February because of a knee injury. He will travel to the U.S. to continue his rehabilitation as he gets closer to a comeback.
New signings Bryan Mbeumo and Matheus Cunha are also part of Ruben Amorim's squad.
Mbeumo, who completed his move from Brentford on Monday, could make his debut against West Ham in New Jersey on Saturday.
André Onana, who picked up a hamstring injury in training and missed the 0-0 draw with Leeds in Stockholm on Saturday, has also made the trip.
The goalkeeper has returned to training and, according to sources, his recovery is progressing well.
It's understood to be unlikely that Onana returns to full fitness before the end of the tour, but it has not been ruled out.
United play West Ham, Bournemouth and Everton in the U.S. before their Premier League campaign kicks off against Arsenal at Old Trafford on Aug. 17.