Fans who purchase* TOUR Championship Grounds Tickets using their Mastercard in May, June, July, and August will have the chance to win a ticket upgrade! Each month, a winner will be chosen to receive up to two (2) Shared Marquee tickets for the day of the original grounds ticket purchase. A grand prize, consisting of one (1) honorary observer group for two (2) people on Sunday, August 14th, will be awarded to a winner who purchased one or more grounds tickets from May through August 3rd. NO PUR NEC. 50 US/DC, 18+, Mastercard cardholders as of 4/30. Ends 8/12.