Belarus number one Victoria Azarenka progressed to the US Open third round after securing a solid 6-3, 6-2 win over American Christina McHale (43).
The World No.17 will next face either Marina Erakovic of New Zealand (82) or Russia's Elena Vesnina (51). In the opener Victoria Azarenka outplayed World No.90 Misaki Doi of Japan.
20-year-old Alexandra Sasnovich of Belarus (World No.120) made a stout resistance to World. No.11 Caroline Wozniacki of Denmark in a 3-6, 4-6 defeat in her second round. World No.117 Olga Govortsova lost to Eugenie Bouchard of Canada (8) 2-6, 1-6 in the opener.
In the men's doubles Max Mirnyi of Belarus and Russia's Mikhail Youzhny lost to the world's best duet brothers Bob and Mike Bryan 2-6, 3-6 in 51 minutes. Max Mirnyi will also play at the US Open mixed doubles. Paired with China's Hao-Ching Chan, Max Mirnyi will go against fifth-seeded Lucie Hradecka of the Czech Republic and Horia Tecau of Romania. In the previous years Max Mirnyi won the mixed doubles three times: with Serena Williams in 1999, Victoria Azarenka in 2007 and Andrea Hlavackova of the Czech Republic in 2013.
The $38.3 million US Open will finish on 8 September.