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The 2021 Extreme Rules was a professional wrestling event produced by WWE. It was the 13th annual Extreme Rules and took place on September 26, 2021, at the Nationwide Arena in Columbus, Ohio. The event aired via pay-per-view (PPV) and livestreaming, marking the first Extreme Rules to livestream on Peacock, and featured wrestlers from the promotion's Raw and SmackDown brand divisions. It was also the first and so far only Extreme Rules event to be held in September, replacing Clash of Champions that was previously held during that month; Extreme Rules was moved to October the following year.