CREATE TABLE table_70088 ("Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Partner" CLOB, "Opponents in final" CLOB, "Score" CLOB)

On what surface was the 26 August 2001 tournament played?
SELECT "Surface" FROM table_70088 WHERE "Date" = '26 august 2001'
SELECT "Surface" FROM "table_70088" WHERE "Date" = '26 august 2001'