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 |
| --- | --- | --- | --- | --- |
| 21 October 2002 | Windhoek | Hard | Gwinyai Tongoona | 7–5, 6–1 |
| 28 October 2002 | Gaborone | Hard | Genius Chidzikwe | 6–4, 6–2 |
| 4 November 2002 | Bulawayo | Hard | Genius Chidzikwe | 4–6, 6–3, 6–3 |
| 11 August 2003 | Lagos | Hard | Valentin Sanon | 6–4, 6–1 |
| 15 September 2003 | Mombasa | Hard | Mohamed Maamoun | 7–5, 2–6, 7–6 |
| 29 September 2003 | Kigali | Clay | Jaroslav Pospíšil | 6–4, 4–6, 7–5 |
| 20 October 2003 | Lagos | Hard | W.P. Meyer | 6–4, 6–2 |
| 19 February 2007 | Brownsville | Hard | Horia Tecău | 6–3, 3–6, 7–5 |
Question:
What was the court surface when the score was 6–4, 6–1?
Answer:
Hard