Table:
text: Christopher Kas
Doubles: 19 (5–14)
Doubles: 19 (5–14)
Outcome Date_ Surface Partner Opponent_in_the_final Score_in_the_final
Runner-up 16 July 2006 Clay Oliver Marach Jonas Björkman Thomas Johansson 3–6, 6–4, [4–10]
Runner-up 23 July 2006 Clay Lucas Arnold Ker Alberto Martín Fernando Vicente 4–6, 3–6
Runner-up 29 July 2007 Clay Tomas Behrend Potito Starace Luis Horna 6–7 (4–7) , 6–7 (5–7)
Runner-up 14 October 2007 Hard (i) Tomas Behrend Mariusz Fyrstenberg Marcin Matkowski 4–6, 2–6
Runner-up 2 March 2008 Hard (i) Rogier Wassen Paul Hanley Jordan Kerr 3–6, 6–3, [8–10]
Winner 13 July 2008 Clay Philipp Kohlschreiber Michael Berrer Mischa Zverev 6–3, 6–4
Runner-up 26 October 2008 Hard (i) Philipp Kohlschreiber Mahesh Bhupathi Mark Knowles 3–6, 3–6

Question: Which surface of Christopher Kas has a partner of Oliver Marach?