Trial plan B?
Jesse Marsch has been associated with a 4-2-2-2 formation throughout his career, but it's been used sparingly at Leeds United. The 4-2-3-1 dominated the run-in and has continued in the first three friendlies of the summer.
Liam Cooper referenced a 4-2-2-2 shape at the start of pre-season, so this may be a chance Marsch takes to try it out if he does want to have a plan B when the Premier League starts up. There will be one more chance back in the UK before the campaign starts.