Table: tennis_matches_37
Columns: outcome
date
tournament
surface
opponent_in_the_final
score_in_the_final

Question: What is the outcome on March 20, 1994?
SQL: SELECT "outcome" FROM tennis_matches_37 WHERE "date" = 'march 20, 1994'

Question: What tournament had a hard surface on February 25, 1996?
SQL: SELECT "tournament" FROM tennis_matches_37 WHERE "surface" = 'hard' AND "date" = 'february 25, 1996'

Question: What is the score in the final with a hard surface and is against Hiromi Nagano?
SQL: SELECT "score_in_the_final" FROM tennis_matches_37 WHERE "surface" = 'hard' AND "opponent_in_the_final" = 'hiromi nagano'

Question: What is the total outcome for the clay surface on April 21, 1996?
SQL: SELECT "outcome" FROM tennis_matches_37 WHERE "surface" = 'clay' AND "date" = 'april 21, 1996'