John Cena vs. Daniel Bryan (2013)
Upon recapturing the WWE Championship at WrestleMania 29, John Cena had set back challenges from Ryback and Mark Henry but faced his toughest adversary to date at SummerSlam in the form of Daniel Bryan. At that point, Bryan had been riding a wave of momentum, and fans were hungry to witness him climb the mountaintop and claim the championship.
Anyone who doubted Daniel's ability to be a top-tier talent had a change of heart following his phenomenal performance at the biggest blockbuster of the summer, taking the fight to Cena and refusing to give up until he had the gold in his grasp. The two found instant in-ring chemistry with one another and contested an exceptional matchup from start to finish.
Cena came close to retaining his title at a few different points, but Bryan was resilient, ultimately nailing Cena with a running knee to secure his premier WWE Championship. It was a monumental moment in the career of WWE's resident “Yes!” man and in the history of the August extravaganza on the whole.