premise: Ten matches were possessed by SummerSlam.
hypothesis: SummerSlam (2009) . Eight matches were contested on the event 's card . SummerSlam (2011) . Six matches were scheduled for the event , with a seventh was added during the show when Alberto Del Rio cashed in his `` Money in the Bank '' briefcase and defeated CM Punk . SummerSlam (2014) . Eight professional wrestling matches were scheduled on the event 's main card and one match took place on the pre-show , which was streamed on the WWE Network . SummerSlam (2016) . Twelve matches were contested at the event , including three matches contested on the pre-show .