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 | Opponent in the final | Score |
| --- | --- | --- | --- | --- |
| 4 February 2002 | Nottingham , Great Britain F1 | Carpet | Luke Milligan | 6–7(5), 7–6(6), 6–4 |
| 12 July 2004 | Manchester , Great Britain | Grass | Michael Mertinak | 6–1, 6–3 |
| 4 July 2005 | Nottingham , Great Britain | Grass | Mark Hilton | 6–3, 7–5 |
| 21 November 2005 | Sunderland , Great Britain | Hard | Danai Udomchoke | 7–6(4), 7–5 |
| 23 January 2006 | Wrexham , Great Britain | Hard | Stéphane Robert | 6–3, 6–2 |
| 6 February 2006 | Bergamo , Italy | Carpet | Simone Bolelli | 6–1, 3–0 Ret. |
| 20 November 2006 | Shrewsbury , Great Britain | Hard | Mischa Zverev | 4–6, 6–4, 6–4 |
| 9 April 2007 | Valencia, CA , USA | Hard | Zack Fleishman | 6–4, 6–7(4), 6–3 |
| 7 July 2008 | Granby , Canada | Hard | Danai Udomchoke | 7–6(14), 3–6, 7–6(6) |
| 18 October 2009 | Kolding , Denmark | Hard | Ivan Dodig | 3–6, 7–6(7), Def. |
| 23 January 2011 | Tamarac, FL , USA F2 | Clay | Daniel Smethurst | 6–4, 0–6, 6–2 |
| 8 July 2012 | Pittsburgh, PA , USA F18 | Clay | Matheson Klein | 6–2, 6–4 |
| 15 July 2012 | Rochester, NY , USA F19 | Clay | Chase Buchanan | 6–3, 6–4 |
Question:
Which Surface is on 23 january 2011?
Answer:
Clay