Table:
text: Magnus Norman
Singles: 18 (12–6)
Singles: 18 (12–6)
Outcome Date_ Championship Surface Opponent_in_the_final Score_in_the_final
Winner 13 July 1997 Båstad , Sweden Clay Juan Antonio Marín 7–5, 6–2
Runner-up 19 October 1997 Ostrava , Czech Republic Carpet (i) Karol Kučera 2–6 ret.
Runner-up 27 July 1998 Umag , Croatia Clay Bohdan Ulihrach 3–6, 6–7(0)
Winner 9 August 1998 Amsterdam , Netherlands Clay Richard Fromberg 6–3, 6–3, 2–6, 6–4
Winner 25 April 1999 Orlando , USA Clay Guillermo Cañas 6–0, 6–3
Winner 25 July 1999 Stuttgart , Germany Clay Tommy Haas 6–7 (6–8) , 4–6, 7–6 (9–7) , 6–0, 6–3
Winner 1 August 1999 Umag , Croatia Clay Jeff Tarango 6–2, 6–4

Question: What is the date of the match with a finals score of 6-3 6-3 2-6 6-4 for Magnus Norman's singles: 18 (12-6)?