Table:
text: Bitburger Open
Previous winners
Previous winners
Year_ Mens_singles Womens_singles Mens_doubles Womens_doubles Mixed_doubles
2007 Lu Yi Wang Yihan Mathias Boe Carsten Mogensen Yang Wei Zhang Jiewen Kristof Hopp Birgit Overzier
2008 Chetan Anand Maria Febe Kusumastuti Mathias Boe Carsten Mogensen Helle Nielsen Marie Roepke Diju Valiyaveetil Jwala Gutta
2009 Jan Ø. Jørgensen Juliane Schenk Rupesh Kumar Sanave Thomas Helle Nielsen Marie Roepke Mikkel Delbo Larsen Mie Schjoett-Kristensen
2010 Chen Long Liu Xin Mathias Boe Carsten Mogensen Pan Pan Tian Qing Zhang Nan Zhao Yunlei
2011 Hans-Kristian Vittinghus Li Xuerui Bodin Isara Maneepong Jongjit Mizuki Fujii Reika Kakiiwa Chan Peng Soon Goh Liu Ying
2012 Chou Tien-chen Juliane Schenk Ingo Kindervater Johannes Schoettler Wang Rong Zhang Zhibo Anders Kristiansen Julie Houmann

Question: When did Chetan Anand win his first men's singles at the Bitburger Open?

Question: If Chou Tien-Chen won the Bitburger Open men's singles, who won the men's doubles?