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 | No. | Date | Championship | Surface | Opponent in the final | Score in the final |
| --- | --- | --- | --- | --- | --- | --- |
| Winner | 46. | January 28, 2007 | Australian Open, Melbourne, Australia (3) | Hard | Fernando González | 7–6 (7–2) , 6–4, 6–4 |
| Winner | 47. | March 3, 2007 | Dubai, United Arab Emirates (4) | Hard | Mikhail Youzhny | 6–4, 6–3 |
| Winner | 48. | May 20, 2007 | Hamburg, Germany (4) | Clay | Rafael Nadal | 2–6, 6–2, 6–0 |
| Runner-up | 15. | June 10, 2007 | French Open, Paris, France (2) | Clay | Rafael Nadal | 3–6, 6–4, 3–6, 4–6 |
| Winner | 49. | July 8, 2007 | Wimbledon, London, England, UK (5) | Grass | Rafael Nadal | 7–6 (9–7) , 4–6, 7–6 (7–3) , 2–6, 6–2 |
| Winner | 51. | September 9, 2007 | US Open, New York City, United States (4) | Hard | Novak Djokovic | 7–6 (7–4) , 7–6 (7–2) , 6–4 |
| Runner-up | 17. | October 21, 2007 | Madrid, Spain | Hard (i) | David Nalbandian | 6–1, 3–6, 3–6 |
| Winner | 52. | October 28, 2007 | Basel, Switzerland (2) | Hard (i) | Jarkko Nieminen | 6–3, 6–4 |
Question:
On the date October 21, 2007, what is the No.?
Answer:
17.0