Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year Location | Mens Singles | Womens Singles | Mens Doubles | Womens Doubles |
| --- | --- | --- | --- | --- |
| 2012 Doha | Xu Xin | Chen Meng | Ma Lin Xu Xin | Li Xiaodan Wen Jia |
| 2011 Doha | Xu Xin | Liu Shiwen | Wang Liqin Xu Xin | Guo Yue Li Xiaoxia |
| 2010 Doha | Wang Liqin | Guo Yue | Ma Lin Wang Hao | Ding Ning Liu Shiwen |
| 2009 Doha | Timo Boll | Zhang Yining | Ma Long Xu Xin | Guo Yue Zhang Yining |
| 2008 Doha | Ma Lin | Zhang Yining | Chen Qi Ma Lin | Guo Yue Zhang Yining |
| 2007 Doha | Ma Lin | Li Xiaoxia | Cho Eon-Rae Lee Jung-Woo | Li Xiaoxia Wang Nan |
| 2006 Doha | Wang Liqin | Zhang Yining | Wang Hao Wang Liqin | Wang Nan Zhang Yining |
| 2005 Doha | Wang Liqin | Zhang Yining | Kong Linghui Wang Hao | Guo Yue Niu Jianfeng |
| 2003 Doha | Vladimir Samsonov | Tamara Boros | Kalinikos Kreanga Jörg Roßkopf | Tatyana Logatzkaya Veronika Pavlovich |
| 2002 Doha | Jean-Michel Saive | Wang Nan | Wang Liqin Yan Sen | Li Jia Niu Jianfeng |
| 2001 Doha | Zoran Primorac | Kim Hyon-Hui | Chang Yen-Shu Chiang Peng-Lung | Kim Moo-Kyo Ryu Ji-Hae |
| 1999 Doha | Zoran Primorac | Jing Tian-Zorner | Chang Yen-Shu Chiang Peng-Lung | Csilla Bátorfi Krisztina Tóth |
| 1998 Doha | Zoran Primorac | Li Ju | Wang Liqin Yan Sen | Li Ju Wang Nan |
Question:
Who is listed under mens singles when the year location is 2009 doha?
Answer:
Timo Boll