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:
| Outcome | Date | Surface | Opponent | Score |
| --- | --- | --- | --- | --- |
| Winner | 14 April 2008 | Clay | James Blake | 6–4, 1–6, 7–5 |
| Runner-up | 7 November 2010 | Hard (i) | David Ferrer | 5–7, 3–6 |
| Winner | 31 July 2011 | Clay | Fernando Verdasco | 6–4, 3–6, 6–3 |
| Winner | 5 November 2011 | Hard (i) | Juan Mónaco | 6–2, 4–6, 7–6 (7–3) |
| Runner-up | 15 July 2012 | Clay | Marin Čilić | 4–6, 2–6 |
| Winner | 3 August 2013 | Clay | Juan Mónaco | 0–6, 7–6 (7–3) , 6–4 |
Question:
Which surface has an Opponent of fernando verdasco?
Answer:
Clay