Liverpool and Manchester United are set to meet in pre-season in the US, with the second biggest stadium in the world lined up as a potential venue.
Michigan's 107,000-capacity 'Big House' stadium is a possible capacity for the game.
The capacity has been reduced from when 109.000 watched United play Real Madrid there in 2014.
The biggest stadium in the world is the 114,000-capacity Rungrado 1 May Stadium in Pyongyang, North Korea.