CREATE TABLE "singles_55_44_11" (
  "outcome" text,
  "date" text,
  "championship" text,
  "surface" text,
  "opponent" text,
  "score" text
);

Question: What is the surface on 21 june 1993?
SQL: SELECT "surface" FROM "singles_55_44_11" WHERE "date"='21 june 1993';

Question: what is the score when the championship is rome and the opponent is richard krajicek?
SQL: SELECT "score" FROM "singles_55_44_11" WHERE "championship"='rome' AND "opponent"='richard krajicek';

Question: who is the opponent when the surface is clay, the outcome is winner and the championship is estoril on 15 april 1996?
SQL: SELECT "opponent" FROM "singles_55_44_11" WHERE "surface"='clay' AND "outcome"='winner' AND "championship"='estoril' AND "date"='15 april 1996';

Question: who is the opponent on 18 january 1993?
SQL: SELECT "opponent" FROM "singles_55_44_11" WHERE "date"='18 january 1993';

Question: what is the score when the outcome is winner against yevgeny kafelnikov?
SQL: SELECT "score" FROM "singles_55_44_11" WHERE "outcome"='winner' AND "opponent"='yevgeny kafelnikov';