| Country | Germany  |
|
| Birthday | 02 Nov 1988 | |
| Age | 36 | |
| Higest Rank | 9 (Aug 20,2018) | |
| Prize Money | $ 9,913,953 |
Titles: 7
ITF: 4 | Minor:22019
2018
- Luxembourg
- -dft. B.Bencic
- 6-4 7-5
- October
- Auckland
- -dft. C.Wozniacki
- 6-4 7-6(4)
- January
2017
- Zhuhai
- -dft. C.Vandeweghe
- 7-5 6-1
- October
- Moscow
- -dft. D.Kasatkina
- 6-1 6-2
- October
2011
- Stuttgart
- -dft. C.Wozniacki
- 7-6(3) 6-3
- April
2010
- Bad Gastein
- -dft. T.Bacsinszky
- 6-1 6-4
- July
- Biarritz
- -dft. S.Ferguson
- 6-2 6-2
- July
2009
- Biarritz
- -dft. E.Dzehalevich
- 7-5 6-0
- July
2007
- Bucharest
- -dft. D.Evtimova
- 6-0 6-1
- June
2006
- Bielefeld
- -dft. A.Sieveke
- 6-4 4-6 6-3
- August
- Wahlstedt
- -dft. M.Geznenge
- 6-3 6-2
- August
Finals: 9
2019
- Luxembourg
- -dft. J.Ostapenko
- 6-4 6-1
- October
- Birmingham
- -dft. A.Barty
- 6-3 7-5
- June
2018
- Charleston
- -dft. K.Bertens
- 6-2 6-1
- April
2017
- Mallorca
- -dft. A.Sevastova
- 6-4 3-6 6-3
- June
2016
- Auckland
- -dft. S.Stephens
- 7-5 6-2
- January
2012
- Linz
- -dft. V.Azarenka
- 6-3 6-4
- October
2010
- Luxembourg
- -dft. R.Vinci
- 6-3 6-4
- October
2007
- Darmstadt
- -dft. S.Gehrlein
- 6-0 7-5
- July
2006
- Erding
- -dft. C.Klaschka
- 6-4 1-0 ret.
- October