Seed No.1 Karolina Pliskova and seed No.2 Sofia Kenin both lost their opening matches in the second round of the Western & Southern Open that relocated from Cincinnati to New York this year.
The 2016 Cincinnati champion Pliskova slammed down 11 aces but ruined her overall serve stats with nine double faults in a 7-5 6-4 defeat to Russian world No.41 Veronika Kudermetova.
“I tried to push every point on receiving,” said Kudermetova after her biggest career victory. “I think it was key. I tried to just keep going on her serve.