What was the surface was played on during the week of March 16 one?
Tournament Surface Week Winner and score Finalist Semifinalists
1998 ATP Super 9
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Singles
Singles
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
SELECT Surface FROM table WHERE Week = march 16
march 16