The WWE stars made a surprise appearance at the UFC event on Saturday, October 9, 2021, at The Sphere in Las Vegas. Rey Mysterio, a former WWE champion and current SmackDown commentator, was seen in the crowd cheering on his son, Dominik Mysterio, who was competing in the UFC Fight Night: Holm vs. Vieira event. Dominik lost the fight against Daniel Pineda via unanimous decision.
