Having already lost the top seeds early on Tuesday, Kazak third seed Yulia Putintseva reached the second round of the Sogyo Hashimoto Japan Women’s Open on Wednesday.
Putintseva beat Maria Sakkari of Greece 6-4, 6-3 in just over two hours to set up a second round match against Japan's Kurumi Nara.
Two service breaks in the opening three games were enough for Putintseva to claim the first set 6-4 against Greek opponent despite dropping her own serve in the sixth game.
In the second set, things went with serve until the fourth game when Sakkari broke serve but then dropped her own serve three times to lose the set and match 6-3.
In other first round results, Japan's Naomi Osaka thrashed Anett Kontaveit of Estonia 6-0, 6-2 while Sweden's Rebecca Peterson beat Miyu Kato of Japan 6-3, 7-6(9) and Pole Magda Linette thumped Erika Sema of Japan 6-1, 6-0.
In second round action, American Varvara Lepchenko caused an upset when battling past fourth seed Johanna Larsson of Sweden 6-2, 3-6, 6-4 in a match lasting two hours and 18 minutes, while Slovak Jana Cepelova cruised past Jang Su-Jeong of South Korea 6-3, 6-1.
Czech Katerina Siniakova needed a marathon three-setter to defeat Louisa Chirico of the US 6-4, 5-7, 7-6(3) in a match lasting three hours.