Table: tennis_match_stats_13
Columns: outcome
year
championship
surface
partner
opponents
score

Question: What was the result in 1973 when the surface was clay?
SQL: SELECT "outcome" FROM tennis_match_stats_13 WHERE "year" = 1973 AND "surface" = 'clay'

Question: What was the outcome in 1975?
SQL: SELECT "outcome" FROM tennis_match_stats_13 WHERE "year" = 1975

Question: Who was Margaret Court's opponent on clay in 1975?
SQL: SELECT "opponents" FROM tennis_match_stats_13 WHERE "surface" = 'clay' AND "partner" = 'margaret court' AND "year" = 1975