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 8 | Mark Philippoussis 5-7, 6-4, 6-4, 4-6, 6-2 | Carlos Moyá | Chris Woodruff Gustavo Kuerten |
| Key Biscane | Hard | March 18 | Richard Krajicek 4-6, 6-1, 6-2, 7-5 | Sébastien Grosjean | Francisco Clavet Thomas Enqvist |
| Monte Carlo | Clay | April 19 | Gustavo Kuerten 6-4, 2-1 ret. | Marcelo Ríos | Jérôme Golmard Félix Mantilla |
| Hamburg | Clay | May 3 | Marcelo Ríos 6-7(5), 7-5, 5-7, 7-6(5), 6-2 | Mariano Zabaleta | Nicolás Lapentti Carlos Moyá |
| Rome | Clay | May 10 | Gustavo Kuerten 6-4, 7-5, 7-6(6) | Patrick Rafter | Àlex Corretja Félix Mantilla |
| Montréal | Hard | August 2 | Thomas Johansson 1-6, 6-3, 6-3 | Yevgeny Kafelnikov | Nicolas Kiefer Andre Agassi |
| Cincinnati | Hard | August 9 | Pete Sampras 7-6(7), 6-3 | Patrick Rafter | Andre Agassi Yevgeny Kafelnikov |
| Stuttgart | Hard (i) | October 25 | Thomas Enqvist 6-1, 6-4, 5-7, 7-5 | Richard Krajicek | Andre Agassi Greg Rusedski |
| Paris | Carpet (i) | November 1 | Andre Agassi 7-6(1), 6-2, 4-6, 6-4 | Marat Safin | Nicolás Lapentti Michael Chang |
Question:
what is the week when the finalist is marcelo ríos?
Answer:
April 19