"Kotori Chaos Xyz Changes!? 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.

At Gilag's urging, 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 and Cathy. Ultimately, Yuma and 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.