BOGOTA, Colombia (AP) — Top-seeded Elina Svitolina of Ukraine won her opening match at the Claro Open Colsanitas on Monday, beating Louisa Chirico of the United States 6-2, 6-1 in less than an hour.

Svitolina said she had prepared for the high altitude in Bogota by spending two weeks training there before the clay-court tournament began.

In other matches, two-time champion Lourdes Domínguez Lino of Spain defeated sixth-seeded Shelby Rogers of the United States 6-3, 6-2.

Dinah Pfizenmaier of Germany beat 44-year-old Kimiko Date-Krumm of Japan, 6-2, 7-5. The No. 152-ranked Date-Krumm hasn't won a main-draw WTA match since last September.