According to sources leading up to SummerSlam 2011, Rey Mysterio was originally expected to face The Miz at the event. The rumored match, however, hinged on whether Rey was able to compete despite his recent legitimate knee injury.
A injury angle took place last week on RAW where The Miz attacked his rival before even had a chance to enter the ring for their scheduled match. The match was changed at the very last minute to a six-man tag match.
Mysterio has been hampered by a knee injury suffered at a live event on August 5. Prior to the injury, he was set to receive a big push leading up to SummerSlam, which took place in his home state on Sunday.