Keys advanced to quarterfinals of the Generali Ladies by beating Misaki Doi 6-2, 6-0.
Johanna Konta saw her run at the Generali Ladies Linz ended in the second round with a straight-sets defeat to Madison Brengle of the United States.
Second-seeded Dominika Cibulkova advanced to the second round of the Generali Ladies by beating Belinda Bencic of Switzerland 6-1, 6-2 on Wednesday
John Isner became the first player to advance to the quarterfinals of the Erste Bank Open on Wednesday by beating former champion Feliciano Lopez 7-6 (1), 3-6, 7-6 (2)
Cibulkova beat Belinda Bencic 6-1, 6-2; Keys beat Camila Giorgi 6-3, 6-4 at Generali Ladies.