View this post on Instagram A post shared by WWE (@wwe) Jan. 27 (UPI) -- World Heavyweight Champion CM Punk defended his title against AJ Styles in the main event of WWE Raw . Punk laid out the challenge in the opening segment of Raw Monday, after Styles suggested that he knew he could defeat the champ. Styles is heading into the Royal Rumble on Saturday in a high-stakes match against Gunther. If Styles loses to Gunther, he must retire from WWE. Punk offered the championship match to make sure

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