CREATE TABLE table_5778 ("Outcome" TEXT, "Date" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponent in the final" TEXT, "Score in the final" TEXT)

Which Surface has a Partner of oliver marach?
SELECT "Surface" FROM table_5778 WHERE "Partner" = 'oliver marach'
SELECT "Surface" FROM "table_5778" WHERE "Partner" = 'oliver marach'