CenturyLink Field is over capacity for the Seattle Sounders v Portland TimbersMLS clash on August 25.
The full capacity of the venue has been sold whilst an extra 400 seats have already been snapped up meaning the Sounders could attract a record crowd to the joint-home of the NFL's Seattle Seahawks.
The match is likely to be star signing Clint Dempsey's home debut for the Sounders and could attract more than their record of 67,052 for a 2011 friendly with Manchester United or MLS record of 66,452 against the Timbers last year.
