CREATE TABLE table_27615896_18 (sd VARCHAR2, status VARCHAR2)

What is the total number of sd listings where the status is quarterfinals lost to Novak Djokovic [1]?
SELECT COUNT(sd) FROM table_27615896_18 WHERE status = "Quarterfinals lost to Novak Djokovic [1]"
SELECT COUNT("sd") FROM "table_27615896_18" WHERE "Quarterfinals lost to Novak Djokovic [1]" = "status"