Stevens continues his career and Bertens is dismissed

Stephens will play in the next match with Croatian Petra Martic, winner of the Czech Marcita Fondrosova, 6-4, 7-5.

Ninth-seeded Dutch Keke Bertins, who lost to Russia's Anastasia Pavluchinkova 6-3, 3-6, 3-6.

Russia will face Belarusian Alexandra Sasenovic in the second round, which beat Estonian Annette Contavet 6-3 and 6-3.

The French Caroline Garcia also beat the Australian Zoe Heves 6-3 6-3.

Australian Ashley Barty, who won the title in Sydney last week, defeated Javan Wang 6-2, 6-3. She could face her compatriot Astra Sharma or the Greek Maria Sakari.