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 | Country | Location | Began | Court surface |
| --- | --- | --- | --- | --- |
| Indian Wells Masters | United States | Indian Wells | 1974.0 | Hard |
| Miami Masters | United States | Key Biscayne | 1985.0 | Hard |
| Monte Carlo Masters | Monaco | Roquebrune-Cap-Martin , France | 1897.0 | Clay |
| Rome Masters | Italy | Rome | 1930.0 | Clay |
| Hamburg Masters | Germany | Hamburg | 1892.0 | Clay |
| Canada Masters | Canada | Montreal / Toronto | 1881.0 | Hard |
| Cincinnati Masters | United States | Mason, Ohio | 1899.0 | Hard |
| Essen Masters | Germany | Essen | 1990.0 | Carpet (i) |
| Paris Masters | France | Paris | 1968.0 | Carpet (i) |
Question:
what is the earliest began when the court surface is clay in hamburg?
Answer:
1892.0