Question: What is Date, when Opponent in Final is "Guy Forget"?
SQL: SELECT "Date" FROM "2-1800323-5" WHERE "Opponent in Final" = 'Guy Forget';

Question: What is Opponent in Final, when Date is "13 January 1992"?
SQL: SELECT "Opponent in Final" FROM "2-1800323-5" WHERE "Date" = '13 January 1992';

Question: What is Opponent in Final, when Surface is "Hard", and when Date is "13 January 1992"?
SQL: SELECT "Opponent in Final" FROM "2-1800323-5" WHERE "Surface" = 'Hard' AND "Date" = '13 January 1992';