Sixth-seeded Amanda Anisimova won a quarterfinal battle of 17-year-olds, beating Maria Camila Osorio Serrano 6-2, 1-6, 6-3 in the Claro Open Colsanitas on Friday in Bogota, Colombia.

Anisimova, an American, disappointed the home crowd rooting for Osorio Serrano, who is Colombian. One more win would move the New Jersey native into her second career WTA Tour final. She lost the title match last year at Hiroshima, Japan.

In the semifinals, Anisimova will meet Brazil's Beatriz Haddad Maia, who topped Spain's Sara Sorribes Tormo 6-7 (6), 6-2, 6-3.

Eleventh-seeded Lara Arruabarrena of Spain, the 2012 Bogota champion who has reached the event's finals three times, will oppose Australia's Astra Sharma in the other semifinals. Arruabarrena beat fifth-seeded Tamara Zidansek of Slovenia 6-4, 6-2, and Sharma got past Italy's Sara Errani 6-1, 7-5.

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The last remaining seeded player in the draw at Lugano, Switzerland, fell as Poland's Iga Swiatek upset eighth-seeded Vera Lapko of Belarus 4-6, 6-4, 6-1 in the quarterfinals.

Swiatek's semifinal opponent will be the Czech Republic's Kristyna Pliskova, who defeated Russia's Svetlana Kuznetsova 4-6, 6-3, 7-5.

Fiona Ferro of France edged Switzerland's Stefanie Voegele 7-5, 7-6 (5). Ferro will match up in the semifinals with Slovenia's Polona Hercog, who beat Russia's Veronika Kudermetova 6-4, 6-1.

--Field Level Media

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