CREATE TABLE "single_titles_10" (
  "date" text,
  "tournament" text,
  "surface" text,
  "opponent" text,
  "score" text
);

Question: Who was the opponent in the mallorca 2, spain tournament?
SQL: SELECT "opponent" FROM "single_titles_10" WHERE "tournament"='mallorca 2, spain';

Question: When was varvara lepchenko the opponent?
SQL: SELECT "date" FROM "single_titles_10" WHERE "opponent"='varvara lepchenko';