Watch WWE SmackDown Season 21 Episode 31 Online

Tonight on SmackDown LIVE, WWE Champion Kofi Kingston overcame United States Champion AJ Styles in a non-title Champion vs. Champion Match with the members of The O.C. and The New Day at ringside. Plus, Roman Reigns was denied the opportunity to make a SummerSlam challenge when a pile of scaffold and metal fell down upon him, and Charlotte Flair emerged to challenge Trish Stratus to a match at The Biggest Event of the Summer.