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 | Surface | Week | Winner and score | Finalist | Semifinalists |
| --- | --- | --- | --- | --- | --- |
| Indian Wells | Hard | March 9 | Marcelo Ríos 6–3, 6–7(15), 7–6(4), 6–4 | Greg Rusedski | Thomas Muster Jan-Michael Gambill |
| Key Biscane | Hard | March 16 | Marcelo Ríos 7–5, 6–3, 6–4 | Andre Agassi | Àlex Corretja Tim Henman |
| Monte Carlo | Clay | April 20 | Carlos Moyá 6–3, 6–0, 7–5 | Cédric Pioline | Alberto Berasategui Richard Krajicek |
| Hamburg | Clay | May 4 | Albert Costa 6–2, 6–0, 1–0 Ret. | Àlex Corretja | Karol Kučera Félix Mantilla |
| Rome | Clay | May 11 | Marcelo Ríos w/o | Albert Costa | Alberto Berasategui Gustavo Kuerten |
| Toronto | Hard | August 3 | Patrick Rafter 7–6(3), 6–4 | Richard Krajicek | Andre Agassi Tim Henman |
| Cincinnati | Hard | August 10 | Patrick Rafter 1–6, 7–6(2), 6–4 | Pete Sampras | Magnus Larsson Yevgeny Kafelnikov |
| Stuttgart | Carpet (i) | October 26 | Richard Krajicek 6–4, 6–3, 6–3 | Yevgeny Kafelnikov | Pete Sampras Jonas Björkman |
| Paris | Carpet (i) | November 2 | Greg Rusedski 6–4, 7–6(4), 6–3 | Pete Sampras | Todd Martin Yevgeny Kafelnikov |
Question:
What was the surface that was played on during the week of March 16?
Answer:
Hard