David Moyes accepts Manchester United may need to alter their pre-season arrangements.
United were announced earlier this week as one of the eight teams set to participate in the lucrative International Champions Cup next summer.
The tournament, which also features Real Madrid, Manchester City, Liverpool and both Milan clubs, will run from July 26 to August 4 and be played at 13 venues in total.
However, United are aware the dates clash with the first leg of the third qualifying round of the Europa League - the stage at which the lowest English contestant enters.
In the seedings are filled in a conventional manner, that would be the Capital One Cup winner, or - should the FA Cup winners have already qualified for the Champions League - the runners-up of that competition.
However, those qualification spots revert to the Premier League should they not be filled through cup combat, meaning that the team which finishes sixth - or seventh - might be the lowest ranked.
As United are presently seventh in the Premier League, that could mean they are unable to fulfil their commitments in pre-season - viewed as the time when they maximise their global fanbase, in addition to making significant amounts of money.
"We will prepare for the summer tour at this moment in time," Moyes said.
"The club always want to give their supporters and the media early information.
"We don't want to wait until the last minute.
"We have given the information. If that changes, we will surely change it as well."