CREATE TABLE table_40757 ("Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponent in the final" TEXT, "Score" TEXT)

What was the surface where the opponent was Nathalie Dechy Meilen Tu?
SELECT "Surface" FROM table_40757 WHERE "Opponent in the final" = 'nathalie dechy meilen tu'
SELECT "Surface" FROM "table_40757" WHERE "Opponent in the final" = 'nathalie dechy meilen tu'