5 WrestleMania rematches that took place at SummerSlam

#3 Rey Mysterio vs. Eddie Guerrero (WrestleMania 21 & SummerSlam 2005)

8/21/2005Rey Mysterio defeated Eddie Guerrero in a Ladder match to win custody of Dominick at #SummerSlam from the MCI Center in #WWEDC.#ReyMysterio #ReyMysterioJr #TheUnderdog #Booyaka #EddieGuerrero #LatinoHeat #VivaLaRaza #LieCheatSteal #WWE #WWELegends #WWEHistory pic.twitter.com/SBMgAwmfbu

— Instagram: AWrestlingHistorian (@LetsGoBackToWCW) August 21, 2020

The Undertaker vs. Randy Orton wasn't the only WrestleMania rematch at SummerSlam 2005. Eddie Guerrero and Rey Mysterio too kept their intensely personal feud going between The Show of Shows and The Biggest Party of the Summer as well.

It all started when then-WWE Tag Team Champions Rey Mysterio and Eddie Guerrero decided that they would have a friendly match at WrestleMania 21, where The Master of 619 would come out on top.

Over the months, the dissension between the champs grew to a point where Guerrero attacked his own partner. After squaring off at Judgement Day and The Great American Bash, their feud turned into a personal one with Guerrero bringing Rey's son Dominik Mysterio into the fold.

Guerrero would claim that he was Dominik's biological father, which led to a Ladder Match for "The Custody of Dominik", where The Master of 619 would emerge as the victor.

This rivalry was special because of how layered it was, starting with a friendly match and going all the way to both claiming Dominik as their son.