premise: Matches were contested at SummerSlam.
hypothesis: SummerSlam (2009) . Eight matches were contested on the event 's card . The show was what is known as a supercard , which featured more than one main event match . The main events of the evening included : CM Punk defeating Jeff Hardy in a Tables , Ladders , and Chairs match to win the World Heavyweight Championship for a third time , Randy Orton retaining the WWE Championship against John Cena after the match was restarted multiple times , Christian retaining the ECW Championship against William Regal , and D-Generation X 's Triple H and Shawn Michaels defeating The Legacy 's Cody Rhodes and Ted DiBiase . Other matches featured on the show were WWE Intercontinental Champion Rey Mysterio versus Dolph Ziggler , Montel Vontavious Porter ( MVP ) against Jack Swagger , Chris Jericho , and The Big Show defending the Unified WWE Tag Team Championship against Cryme Tyme ( Shad Gaspard and JTG ) , and Kane facing The Great Khali . SummerSlam (2016) . Twelve matches were contested at the event , including three matches contested on the pre-show .