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UFC on Fox 23: Shevchenko vs. Peña was a mixed martial arts event promoted by the Ultimate Fighting Championship held on January 28, 2017 at Pepsi Center in Denver, Colorado. A potential UFC Women's Bantamweight Championship title eliminator between multiple-time muay thai world champion Valentina Shevchenko and The Ultimate Fighter: Team Rousey vs. Team Tate bantamweight winner Julianna Peña served as the event headliner.
Valentina Shevchenko
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Julianna Peña
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Jorge Masvidal
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Donald Cerrone
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Francis Ngannou
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Andrei Arlovski
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Alex Caceres
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Sam Alvey
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Nate Marquardt
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Raphael Assuncao
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Aljamain Sterling
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Li Jingliang
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Bobby Nash
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Jordan Johnson
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Henrique da Silva
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Alessio Di Chirico
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Marcos Rogério de Lima
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Jeremy Kimball
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Alexandre Pantoja
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Eric Shelton
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Jason Gonzalez
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