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:
| Tournament | 2004 | 2005 | 2006 | 2007 |
| --- | --- | --- | --- | --- |
| Grand Slam Tournaments | Grand Slam Tournaments | Grand Slam Tournaments | Grand Slam Tournaments | Grand Slam Tournaments |
| Australian Open | 2R | 2R | 2R | 2R |
| French Open | W | 3R | 3R | 3R |
| Wimbledon | 2R | 3R | 2R | 2R |
| US Open | 1R | 1R | 3R | 1R |
| Win–Loss | 8–3 | 5–4 | 6–4 | 4–4 |
Question:
Which Tournament has a 2004 of 1r?
Answer:
US Open