On the January 30 episode of "Raw", entered a feud with Chris Jericho after Jericho attacked Punk and Daniel Bryan during their Champion vs. Champion match which helped Bryan gain the win. On the February 6 episode of "Raw", Jericho explained why he attacked Punk, saying that the WWE roster were imitations of himself and he singled out Punk for claiming that he was the best in the world, a moniker that Jericho had used during the last time that he was in WWE. Punk competed in an Elimination Chamber match at Elimination Chamber. The match also featured Jericho who Punk kicked out of the chamber and suffered a short lasting injury. Punk was able to win the match and retain his championship. On the February 20 episode of "Raw", Jericho won a 10-Man No. 1 Contender's Battle Royal and earned a match against Punk for the WWE Championship at WrestleMania XXVIII. To try and gain a psychological edge, Jericho revealed that Punk's father was an alcoholic and also alleged that Punk's sister was a drug addict. Jericho said that Punk's straight edge philosophy was so that he would not end up falling into the same vices and promised that he would make Punk turn to alcohol by defeating him and winning the championship from him. A stipulation was added to the match by John Laurinaitis that if Punk was disqualified, he would have lost the championship. Jericho would then try to get Punk to use a weapon which Punk refused to do. Punk was able to defeat Jericho and retain his championship at WrestleMania XXVIII. On both the April 2 and 9 episodes of "Raw SuperShow", Punk was able to retain his championship against Mark Henry after he lost to him via count-out and disqualification. After both of the matches, Jericho would attack Punk and pour alcohol on him. On the April 16 episode of "Raw SuperShow", Punk was able to pin Henry in a no disqualification, no countout match to retain his title. The feud ended at Extreme Rules when Punk was able to retain his championship by defeating Jericho in a Chicago Street Fight.