Estíbaliz Martínez Yerro[a] (born 9 May 1980 in Vitoria) is a Spanish rhythmic gymnast and Olympic Champion.

She competed at the 1996 Summer Olympics in Atlanta, and won a gold medal with the Spanish group.

[1] The team was formed by Estíbaliz, Estela Giménez, Marta Baldó, Nuria Cabanillas, Lorena Guréndez and Tania Lamarca.

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