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| ruby japanese =
| romaji = Kotori ga Kaosu Ekushīzu Chenji!? Haran no Supōtsu Dyueru Taikai
| japanese translated = Kotori 's Chaos Xyz ChangesChange!? The Tumultuous Sports Duel Tournament
| episode number = 81
| japanese air date = November 25, 2012
}}
'''"Kotori 's Chaos Xyz ChangesChange!? The Tumultuous Sports Duel Tournament"''' is the eighty-first episode of the ''[[Yu-Gi-Oh! ZEXAL]]'' anime. It first aired in Japan on November 25, 2012.
{{episode summary|At [[Gilag]]'s urging, [[Yuma Tsukumo|Yuma]] holds a "[[Sports Duel Tournament]]" to help decide the representative for the [[Super Secret Number Cards Investigation Club]]. Unbeknownst to him, Gilag has brainwashed [[Tori Meadows|Tori]] and [[Cathy Catherine|Cathy]]. Ultimately, Yuma and [[Reginald Kastle|Shark]] are to Duel them, but Shark, who doesn't want to waste his time, leaves at the last minute and is replaced by Gilag.}}
