WTA roundup: Fiona Ferro scores upset win in Istanbul

a person hitting a ball with a racket: French Open © Reuters/CHRISTIAN HARTMANN French Open

France's Fiona Ferro broke serve to end both sets in a 7-5, 6-2 win over second-seeded Petra Martic of Croatia on Tuesday in the first round of the Tennis Championship Istanbul.

Ferro, a 24-year-old who is ranked 57th in the world, saved six of the eight break points she faced while converting half of her 10 break opportunities.

Top-seeded Elise Mertens of Belgium cruised in her opening match, downing Spain's Lara Arruabarrena 6-2, 6-0. Third-seeded Veronika Kudermetova of Russia edged the United States' Bernarda Pera 6-4, 3-6, 7-6 (4), taking control by winning four consecutive points in the decisive tiebreaker.

Fourth-seeded Daria Kasatkina of Russia and fifth-seeded Barbora Krejcikova of the Czech Republic advanced, but Anastasia Potapova topped sixth-seeded Anastasia Pavlyuchenkova 7-6 (2), 6-7 (8), 6-4 in an all-Russian showdown.

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WTA roundup: Fiona Ferro scores upset win in Istanbul