title in a fatal four-way match at SummerSlam against Samoa Joe, Roman Reigns and Braun Strowman. Lesnar and Heyman stated that both would leave WWE should Lesnar lose the championship in the match. At SummerSlam on August 20, Lesnar retained the title by pinning Reigns. The next night on Raw, Lesnar was attacked by Strowman. The subsequent title match at No Mercy on September 24 was won by Lesnar. Lesnar then defeated WWE Champion AJ Styles in an interbrand Champion vs Champion non-title match at Survivor Series on November 19. His next title defense was scheduled for the Royal Rumble on January 28, 2018, where he successfully defended the title in a triple threat match against Strowman and Kane. Lesnar then re-ignited his feud with Roman Reigns, who won the Elimination Chamber match at Elimination Chamber on February 25 to become the number one contender to Lesnar's title at WrestleMania 34. At WrestleMania on April 8, Lesnar pinned Reigns to retain the title in the main event. Rumors arose that Lesnar would leave WWE and rejoin the UFC. On April 9, Lesnar re-signed with WWE. At the Greatest Royal Rumble pay-per-view on April 27, he again defeated Reigns in a steel cage when Reigns speared Lesnar through the cage wall. As Lesnar escaped the cage first, he was declared the winner. After the Greatest Royal Rumble, Lesnar was absent from WWE television for nearly three months. At Extreme Rules on July 15, Raw General Manager Kurt Angle threatened to strip Lesnar of the Universal Championship if he did not show up to Raw the following night. The following night on Raw, Heyman agreed that Lesnar would defend his title at SummerSlam; Reigns became the number one contender later that same night. On the July 30 episode of Raw, Lesnar was at the arena but refused to appear in the ring. Angle threatened to fire Heyman if he could not persuade Lesnar to come to the ring. Throughout the broadcast, Heyman's attempts were unsuccessful. At the end of the show, after Angle had fired him, Lesnar appeared to attack Angle and choke Heyman. Two weeks later, the dissension between Lesnar and Heyman was revealed to be just a ruse when Lesnar returning on the August 13 episode of Raw to attack Reigns. At SummerSlam on August 19, Strowman was at ringside ready to cash in his Money in the Bank contract