#2 John Cena
When you talked about CM Punk's career in WWE, there is one name that you can't omit and that is John Cena. The Cenation Leader was an integral part of Punk's rise as a megastar in WWE. The duo's paths have crossed numerous time but the one match that has come to define the careers of both these Superstars is their classic bout for the WWE Championship at Money in the Bank 2011. During the build-up to their match, Punk has dropped the infamous ' pipebomb' promo following which he was suspended (in storyline).
On Cena's insistence, Vince McMahon lifted Punk's suspension under one condition - if Cena lost to Punk at MITB, he would be fired. The match the duo had will go down in history as one of the best WWE matches. Punk escaping through his hometown crowd in Chicago before blowing a goodbye kiss to Vince McMahon is a scene fans will never forget.
The duo would once again lock horns for the Undisputed WWE Championship in the main event of SummerSlam 2011 where Punk would once again get the better off The Cenation Leader. The duo's last notable singles match was on an episode of RAW where Cena defeated Punk for an opportunity to face The Rock for the WWE Championship in the main event of WrestleMania 29.