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 | Tournament | Surface | Opponent | Score |
| --- | --- | --- | --- | --- | --- |
| Runner-up | 23 August 2004 | Maribor , Slovenia | Clay | Maša Zec Peškirič | 6–2, 7–5 |
| Winner | 25 April 2005 | Rabat , Morocco | Clay | Dominika Cibulková | 6–1, 3–6, 6–4 |
| Runner-up | 27 March 2006 | Abu Dhabi , United Arab Emirates | Hard | Katerina Avdiyenko | 6–4, 6–2 |
| Winner | 11 July 2006 | Torun , Poland | Clay | Joanna Sakowicz | 6–0, 6–2 |
| Runner-up | 18 July 2006 | Dnepropetrovsk , Ukraine | Clay | Kristina Antoniychuk | 6–3, 6–7(5), 6–4 |
| Winner | 22 August 2006 | Maribor , Slovenia | Clay | Dia Evtimova | 6–4, 2–6, 6–3 |
| Runner-up | 8 March 2011 | Irapuato , Mexico | Hard | Marina Erakovic | 7–5, 6–4 |
Question:
Which surface has a Date of 22 august 2006?
Answer:
Clay