CREATE TABLE table_7949 ("Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Partnering" TEXT, "Opponents in the final" TEXT, "Score" TEXT)

What is Surface, when Opponents In The Final is 'Christophe Rochus Olivier Rochus'?
SELECT "Surface" FROM table_7949 WHERE "Opponents in the final" = 'christophe rochus olivier rochus'
SELECT "Surface" FROM "table_7949" WHERE "Opponents in the final" = 'christophe rochus olivier rochus'