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Aliya Mustafina's most difficult skills + Simone Biles needs to perform these amazing skills
The most difficult skills performed by Russian gymnast Aliya Mustafina (2009-18). Vault: Amanar, Double Twisting Yurchenko, Half On Layout Full. Uneven Bars: Van Leeuwen, Chow Half, Seitz, Komova II, ...
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