Mexico City reshapes the WWE and AAA title picture.

Sami Zayn left Mexico City with the Undisputed WWE Championship. El Grande Americano took the AAA Mega Championship, and La Catalina ended a reign that had lasted more than three years. Across SmackDown on September 11, Triplemanía 34's second night on September 13 and Raw on September 14, several title pictures changed. Roman Reigns kept his championship.

SmackDown: Zayn takes the title

Sami Zayn defeated CM Punk for the Undisputed WWE Championship. WWE's recap describes a finish involving Johnny Gargano, Candice LeRae and Kevin Owens, with Owens accidentally striking Punk with the title before Zayn landed the Helluva Kick.

Owens' part in the finish leaves Punk with more than the loss to address. It gives the championship change a storyline that can continue beyond the celebration. Elsewhere on SmackDown, Chelsea Green retained against Nia Jax, and Rey Fenix defended the AAA Cruiserweight Championship against Ricky Saints.

Triplemanía: more than one new champion

El Grande Americano beat Dominik Mysterio for the AAA Mega Championship on Triplemanía's Mexico City card. In WWE's account, Rey Mysterio stepped in as referee for the deciding count after the original official had been taken out.

La Catalina beat Flammer for the Reina de Reinas Championship, ending a 1,128-day reign, according to the official recap. Hijo de Dr. Wagner Jr. and Galeno also took the AAA Tag Team Championship from The War Raiders. The changes reached well beyond the Mega Championship: AAA had several new champions to carry into its subsequent shows.

Raw: Reigns holds, new challengers advance

Roman Reigns retained the World Heavyweight Championship against Penta on Raw. WWE's report describes Reigns catching a springboard attempt with a Superman Punch and finishing with a Spear. Chad Gable retained the Intercontinental Championship against Dragon Lee, while Je'Von Evans and Lola Vice qualified for Money in the Bank.

For a catch-up watch, Zayn–Punk supplies the disputed finish, Triplemanía the largest cluster of title changes and Reigns–Penta the successful defense. WWE's official recaps below carry the match clips. The new champions and Money in the Bank qualifiers give the next television shows plenty to build on without treating every belt as part of the same title picture.