CREATE TABLE "singles_13_6_7" (
  "date" text,
  "tournament" text,
  "surface" text,
  "opponent" text,
  "score" text
);

Question: Who was the Opponent in the Auckland, New Zealand Tournament?
SQL: SELECT "opponent" FROM "singles_13_6_7" WHERE "tournament"='auckland, new zealand';

Question: On what Date was Rafael Nadal the Opponent?
SQL: SELECT "date" FROM "singles_13_6_7" WHERE "opponent"='rafael nadal';

Question: Who was the Opponent on a Hard (i) Surface?
SQL: SELECT "opponent" FROM "singles_13_6_7" WHERE "surface"='hard (i)';

Question: What was the Score at the Auckland, New Zealand Tournament?
SQL: SELECT "score" FROM "singles_13_6_7" WHERE "tournament"='auckland, new zealand';