CREATE TABLE "singles_titles_5" (
  "date" text,
  "tournament" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score" text
);

Question: What surface was the tournament played on against Steven Diez?
SQL: SELECT "surface" FROM "singles_titles_5" WHERE "opponent_in_the_final"='steven diez';

Question: What date was the game played on the hard surface at the Tournament of Sweden f2?
SQL: SELECT "date" FROM "singles_titles_5" WHERE "surface"='hard' AND "tournament"='sweden f2';

Question: What was the playing surface for the Tournament of Great Britain F16?
SQL: SELECT "surface" FROM "singles_titles_5" WHERE "tournament"='great britain f16';