What happened: Houston Dynamo face CD Olimpia in a friendly at Shell Energy Stadium on Sunday at 6 p.m. The club says tickets will be sold for cash at the stadium box office ahead of kickoff, in addition to standard online sales.

Why it matters: The exhibition is the same friendly against CD Olimpia Houston has been promoting as part of a busy summer slate at Shell Energy Stadium.

What to watch: Gates open ahead of Sunday's 6 p.m. kickoff, with box-office cash sales confirmed as a day-of ticket option.