Table: tennis_match_results_20
Columns: tournament
surface
week
winner_and_score
finalist
semifinalists

Question: what is the semifinalists when the surface is hard (i)?
SQL: SELECT "semifinalists" FROM tennis_match_results_20 WHERE "surface" = 'hard (i)'

Question: what is the surface when the winner and score is gustavo kuerten 6-4, 7-5, 7-6(6)?
SQL: SELECT "surface" FROM tennis_match_results_20 WHERE "winner_and_score" = 'gustavo kuerten 6-4, 7-5, 7-6(6)'

Question: who is the winner and score for the week of august 9?
SQL: SELECT "winner_and_score" FROM tennis_match_results_20 WHERE "week" = 'august 9'

Question: what is the surface for the week of october 25?
SQL: SELECT "surface" FROM tennis_match_results_20 WHERE "week" = 'october 25'

Question: who is the winner and score for finalist sébastien grosjean?
SQL: SELECT "winner_and_score" FROM tennis_match_results_20 WHERE "finalist" = 'sébastien grosjean'

Question: what is the week when the finalist is marcelo ríos?
SQL: SELECT "week" FROM tennis_match_results_20 WHERE "finalist" = 'marcelo ríos'