Question: What is the surface on 21 June 1993?
SQL: SELECT "Surface" FROM "2-166170-5" 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 "2-166170-5" 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 "2-166170-5" 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 "2-166170-5" WHERE "Date" = '18 January 1993';

Question: what is the score when the outcome is Winner against Yevgeny Kafelnikov?
SQL: SELECT "Score" FROM "2-166170-5" WHERE "Outcome" = 'Winner' AND "Opponent" = 'Yevgeny Kafelnikov';