As of 4 p.m., more than 57,000 tickets had been sold overall for the Sounders-Barcelona game Aug. 5 at Qwest Field. That leaves about 10,000 available.
Meanwhile, the club also announced that fewer than 2,000 tickets remain for the friendly against Chelsea on July 18.
Tickets also remain available for the U.S. Open Cup doubleheader on July 4, and for each of the Sounders final six regular season home games.
Tickets and information available through the Sounders website.