Table: tennis_tournaments_5
Columns: week_of
tournament
champion
runner_up
semifinalists
quarterfinalists

Question: In the week of what was the runner-up Pat Du Pré?
SQL: SELECT "week_of" FROM tennis_tournaments_5 WHERE "runner_up" = 'Pat Du Pré'

Question: Who were the semifinalists when the runner-up was Peter Feigl?
SQL: SELECT "semifinalists" FROM tennis_tournaments_5 WHERE "runner_up" = 'Peter Feigl'

Question: Who were the semifinalists when the runner-up was Pat Du Pré?
SQL: SELECT "semifinalists" FROM tennis_tournaments_5 WHERE "runner_up" = 'Pat Du Pré'

Question: Who were the semifinalists in the week of 13 November when the runner-up was Pat Du Pré?
SQL: SELECT "semifinalists" FROM tennis_tournaments_5 WHERE "week_of" = '13 November' AND "runner_up" = 'Pat Du Pré'