Doha tennis results

Following are the second round results of the WTA Qatar Open on Tuesday (prefix number denotes seeding):

3-Agnieszka Radwanska, Poland, bt Kateryna Bondarenko, Ukraine, 6-4, 6-4

Euginie Bouchard, Canada, bt Denisa Allertova, Czech Republic, 7-6 (7-0), 7-5

Andrea Petkovic, Germany, bt Margarita Gasparyan, Russia, 6-3, 6-3

Carla Suarez, Spain, bt Donna Vekic, Croatia, 7-6 (7-5), 6-4

Zheng Saisai, China, bt 1-Angelique Kerber, Germany, 7-5, 6-1

Jelena Ostapenko, Latvia, bt 12-Svetlana Kuznetsova, Russia, 7-6 (7-5), 6-0

5-Petra Kvitova, Czech Republic, bt Barbora Zahlavova, Czech Republic, 7-6 (7-2), 6-4

Tmmea Babos, Hungary, bt 16-Sara Errani, Italy, 6-4, 6-1

Coco Vandeweghe, United States, bt 6-Belinda Bencic, Switzerland, 6-4, 6-2

9-Roberta Vinci, Italy, bt Darya Kasatkina, Russia, 2-6, 6-4, 7-6 (7-3)

11-Timea Bacsinszky, Switzerland, bt Yulia Putintseva, Kazakhstan, 6-2, 7-6 (7-0)

Monica Niculescu, Romania, bt 14-Jelena Jankovic, Serbia, 3-6, 6-4, 7-5

Caroline Wozniacki, Denmark, bt Daria Gavrilova, Australia, 6-3, 6-3

Elena Vesnina, Russia, bt 2-Simona Halep, Romania, 6-7 (1-7), 6-4, 6-1

Endi