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 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 | 1987 | 1988 | 1989 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Australian Open | 3R | A | 3R | A | 3R | NH | 4R | A | A |
| French Open | 2R | 1R | 4R | 2R | 1R | 3R | A | A | A |
| Wimbledon | 4R | 2R | 1R | 4R | 2R | 3R | 2R | A | 3R |
| US Open | 1R | A | 1R | 1R | 3R | 1R | 4R | A | A |
| Year End Ranking | 34 | 104 | 51 | 59 | 40 | 99 | 42 | – | 231 |
Question:
Which Tournament has a 1984 of 1r?
Answer:
US Open