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:
| Date | Tournament | Surface | Partner | Opponents | Score |
| --- | --- | --- | --- | --- | --- |
| March 25, 2007 | Canada F3, Rock Forest | Hard (i) | Érik Chvojka | Christophe Palmanshofer Jason Zimmermann | 7–5, 6–3 |
| October 12, 2008 | Germany F22, Leimen | Hard (i) | Michal Navrátil | Nils Langer Frank Wintermantel | 6–3, 6–4 |
| November 9, 2008 | Rimouski , Canada | Hard (i) | Milos Raonic | Kristian Pless Michael Ryderstedt | 5–7, 6–4 [10–6] |
| November 23, 2008 | Nicaragua F1, Managua | Hard | Jiří Krkoška | Alexandru Cojanu Deniss Pavlovs | 7–6 (7–1) , 6–3 |
| May 10, 2009 | Mexico F4, Coatzacoalcos | Hard | Adil Shamasdin | Kaden Hensel Adam Hubble | 6–3, 6–4 |
| May 17, 2009 | Mexico F5, Puerto Vallarta | Hard | Adil Shamasdin | Juan Manuel Elizondo César Ramírez | 6–1, 2–6, [10–7] |
| July 19, 2009 | USA F17, Peoria | Clay | Milos Raonic | Matt Reid Denis Zivkovic | 6–3, 6–4 |
| August 23, 2009 | Romania F14, Arad | Clay | Marius Copil | Andrei Mlendea Jiří Školoudík | 6–3, 6–4 |
| September 20, 2009 | Italy F28, Porto Torres | Hard | Marcus Willis | Alessandro Giannessi Francesco Piccari | 4–6, 6–3, [10–8] |
| October 31, 2009 | Mexico F12, Obregón | Hard | Nima Roshan | Adrien Bossel Julien Dubail | 6–7, 6–3, [11–9] |
| November 29, 2009 | Puebla , Mexico | Hard | Adil Shamasdin | Guillermo Olaso Pere Riba | 7–6 (7–0) , 6–0 |
| April 18, 2010 | León , Mexico | Hard | Santiago González | Kaden Hensel Adam Hubble | 3–6, 6–3, [10–8] |
| March 20, 2011 | Rimouski , Canada | Hard (i) | Treat Conrad Huey | David Rice Sean Thornley | 6–0, 6–1 |
| March 28, 2011 | USA F8, Oklahoma | Hard | Nicholas Monroe | Carsten Ball Chris Guccione | 6–4, 6–3 |
| April 4, 2011 | Tallahassee , United States | Hard | Bobby Reynolds | Go Soeda James Ward | 6–2, 6–4 |
| June 26, 2011 | Guadalajara , Mexico | Hard | Bobby Reynolds | Pierre-Ludovic Duclos Ivo Klec | 6–4, 6–7 (6–8) , [10–6] |
| July 21, 2012 | Granby , Canada | Hard | Philip Bester | Yuichi Ito Takuto Niki | 6–1, 6–2 |
Question:
What was the surface for the May 10, 2009 tournament?
Answer:
Hard