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 July 1988 | Båstad , Sweden | Clay | Sandra Cecchini | 7–5, 6–1 |
| 1 August 1988 | Athens , Greece | Clay | Laura Golarsa | 6–0, 6–1 |
| 17 July 1989 | Estoril , Portugal | Clay | Sandra Cecchini | 7–6(3), 6–2 |
| 31 July 1989 | Sofia , Bulgaria | Clay | Katerina Maleeva | 6–2, 7–6(3) |
| 9 July 1990 | Palermo , Italy | Clay | Barbara Paulus | 6–2, 6–3 |
Question:
What date was the opponent in the final Barbara Paulus?
Answer:
9 July 1990