CREATE TABLE table_36762 ("Outcome" CLOB, "Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

Which Surface has an Opponent of oleksandra kravets?
SELECT "Surface" FROM table_36762 WHERE "Opponent" = 'oleksandra kravets'
SELECT "Surface" FROM "table_36762" WHERE "Opponent" = 'oleksandra kravets'