Table: tennis_match_stats_2
Columns: outcome
year
championship
surface
partner
opponents
score

Question: What was the surface for events held in 1983?
SQL: SELECT "surface" FROM tennis_match_stats_2 WHERE "year" = 1983

Question: What was the total number of matches that had an outcome of Winner, a partner of John Lloyd, and a clay surface?
SQL: SELECT COUNT("opponents") FROM tennis_match_stats_2 WHERE "outcome" = 'Winner' AND "partner" = 'John Lloyd' AND "surface" = 'Clay'

Question: Who were the opponents that led to an outcome of winner on a grass surface?
SQL: SELECT "opponents" FROM tennis_match_stats_2 WHERE "outcome" = 'Winner' AND "surface" = 'Grass'