In September, The Bella Twins returned full-time on "Raw" and started feuding with The Riott Squad (Ruby Riott, Liv Morgan and Sarah Logan) over which they scored victories in various tag team and singles matches. To even the odds, Ronda Rousey aligned with The Bella Twins, and the trio was able to defeat The Riott Squad at WWE Super Show-Down in a six–woman tag team match. Two days later on the October 8 episode of "Raw", after defeating The Riott Squad in a rematch, Nikki attacked Rousey, with Brie later following suit, turning villainous for the first time since 2015. Later that night, it was announced that Nikki would face Rousey for the Raw Women's Championship in the main event of the first ever all women's pay–per–view, WWE Evolution in which she was unsuccessful despite multiple interferences by Brie. On June 20, 2019, it was announced that a cyst had been found on her brain thus ending her in-ring career.