Somdev Devvarman lost 7-5, 1-6, 6-3 to Croatia's Marin Cilic in the second round of the St. Petersburg Open on Thursday.
At Istanbul, Maria Sharapova's season ended in disappointment on Wednesday after her hopes of regaining the title at the WTA Championships after a seven-year gap and dethroning Caroline Wozniacki as the World No.1 were dashed.
The Russian withdrew from the tournament after losing 7-6(4), 6-4 to Li Na.
That ensured that Denmark's Caroline Wozniacki would become the year-end World No. 1 for the second successive year.
However, the Dane was unable to celebrate that with a victory as she was beaten 6-2, 6-4 by Petra Kvitova on Thursday.
On Wednesday too, Wozniacki was beaten 6-2, 4-6, 6-3 by Vera Zvonareva.
Important results: At St. Petersburg (St. Petersburg Open): Second round: Alex Bogomolov Jr. bt Philipp Kohlschreiber 6-4, 3-6, 7-5; Dusan Lajovic bt Dudi Sela 2-6, 6-2, 6-1; Marin Cilic bt Somdev Devvarman 5-7, 6-1, 6-3; Potito Starace bt Dmitry Tursunov 6-2, 6-4; Janko Tipsarevic bt Michael Berrer 6-3, 2-0 retired. At Vienna (Erste Bank Open): Second round: Tommy Haas bt Aljaz Bedene 4-6, 6-4, 6-1; Daniel Brands bt Radek Stepanek 6-4, 7-6(4); Jurgen Melzer bt Guillermo Garcia Lopez 7-5, 6-1; Xavier Malisse bt Fabio Fognini 6-7(3), 6-3, 6-3.
At Istanbul (WTA Championships): White group: Victoria Azarenka bt Samantha Stosur 6-2, 6-2; Li Na bt Maria Sharapova 7-6(4), 6-4.
Azarenka bt Li 6-2, 6-2.
Red group: Vera Zvonareva bt Caroline Wozniacki 6-2, 4-6, 6-3
Petra Kvitova bt Wocniacki 6-4, 6-2. — Agencies