New Manchester United manager Louis van Gaal has criticised the club's pre-season tour schedule in America.
United play Los Angeles Galaxy in Pasadena on Wednesday, before games in Denver, Washington and Detroit.
Dutchman Van Gaal, 62, blamed "commercial activities" for the amount of travel.
"You have to travel distances, you have to fly a lot, you also have jetlag - that is not very positive for a good preparation," he said.
|Manchester United's US Tour|
|Wednesday July 23: LA Galaxy, Rose Bowl Stadium, Pasadena|
|Saturday July 26: Roma, Sports Authority Field, Denver - International Champions Cup|
|Wednesday July 30: Inter Milan, Fedex Field, Washington - International Champions Cup|
|Saturday August 2: Real Madrid, Michigan Stadium, Detroit - International Champions Cup|
His statement contradicted the words of executive vice-chairman Ed Woodward 24 hours earlier, when he insisted the tour - which will see United travel almost 13,500 miles if they reach the final of the International Champions Cup - did not disrupt preparation.
Van Gaal, who met his players for the first time last week after leading the Netherlands to third place at the World Cup, said he was already making his presence felt at the club.
"The tour was already arranged so I have to adapt - and Manchester United shall do everything to adapt to my rules for good preparation," he said.
The 20-mile trip from the team hotel in Beverly Hills to Pasadena took in excess of an hour despite the assistance of a police escort, and Van Gaal apologised for his late arrival at a news conference to preview the encounter with LA Galaxy.
Asked if he would prefer a shorter tour next year he said: "Yeah, I hope that. And I am very confident that it shall be."
|Manchester United's previous pre-seasons|
|2013-14: Far East and Australia (Bangkok, Sydney, Yokohama, Osaka, Hong Kong) and Stockholm||2008-09: South Africa (Cape Town, Durban, Pretoria), Abuja|
|2012-13: South Africa (Durban, Cape Town), Shanghai, Oslo, Gothenburg, Hannover||2007-08: Far East (Tokyo, Seoul, Macau, Guangzhou), Belfast|
|2011-12: USA (Boston, Seattle, Chicago, New York, Washington) and Belfast||2006-07: South Africa (Durban, Cape Town, Johannesburg), Amsterdam|
|2010-11: North America (Toronto, Philadelphia, Kansas, Houston, Guadalajara) and Dublin||2005-06: Far East (Hong Kong, Beijing, Tokyo), Antwerp|
|2009-10: Far East (Kuala Lumpur, Seoul, Hangzhou), Munich||2004-05: United States (Chicago, Philadelphia, New York)|
Tours have tended to become more long-haul as United's commercial operation has widened.
Not since 2002 have the club remained in Europe for an entire pre-season and last year they travelled in excess of 23,000 miles on a trip that included a week in Australia.
"The Premier League has been very clear in saying America is the number one developing market," said Woodward on Monday.
"This is a very good country from a potential sponsorship perspective."
After leading his team onto the pitch at Pasadena's Rose Bowl stadium in Tuesday's training session with a wave to the 2,500 spectators, Van Gaal then stood back and analysed as his coaches put the players through their paces.
Chris Smalling and Darren Fletcher were singled out when Van Gaal demanded to know why the pair had not looked at the ball during a shooting drill.
When Wayne Rooney completed the task to his new manager's satisfaction, Van Gaal made sure Smalling and Fletcher knew about it.
New signings Ander Herrera and Luke Shaw could make their debuts against La Galaxy in a game expected to attract a crowd in excess of 70,000.