Table: riggs_pro_finals
Columns: outcome
year
pro_slam_championship
surface
opponent_in_the_final
score_in_the_final

Question: What is Opponent In The Final, when Year is "1942"?
SQL: SELECT "opponent_in_the_final" FROM riggs_pro_finals WHERE "year" = 1942

Question: What is the average Year, when Outcome is "Winner"?
SQL: SELECT AVG("year") FROM riggs_pro_finals WHERE "outcome" = 'winner'