Dominika Cibulkova hardly broke a sweat as she breezed past Germany's World No.31 Laura Siegmund while Caroline Wozniacki dumped Olympic champion Monica Puig out of the Sydney International
Monica Puig, won the women's singles gold medal at Rio Olympics, lost in the first round of the US Open against China's Zheng Saisai
Monica Puig won Puerto Rico's first ever Olympic gold medal as she defeated Germany's Angelique Kerber in the women's tennis singles final
Svetlana Kuznetsova took just 55 minutes to claim a 6-0, 6-2 victory over Monica Puig in a one-sided final at the Ken Rosewall Arena.
Monica Puig, seeded eighth in the event and ranked 48th in the world, outlasted 92nd-placed Watson 6-4, 6-4 in 94 minutes.
The 24-year-old Russian was diagnosed with Hodgkin's lymphona in 2011, an illness which forced her off tour until May this year.
The 17th-seeded Stephens is the last American singles player left at the grass-court tournament.
Errani, a semi-finalist at the French Open earlier this month had gone into her first round clash carrying a groin injury which forced her out of Eastbourne last week.