Question: Which tournament had an opponent of Petra Krejsová Tereza Smitková?
SQL: SELECT "Tournament" FROM "2-16306899-9" WHERE "Opponents" = 'Petra Krejsová Tereza Smitková';

Question: What was the outcome when Darija Jurak Anaïs Laurendon was the opponent?
SQL: SELECT "Outcome" FROM "2-16306899-9" WHERE "Opponents" = 'Darija Jurak Anaïs Laurendon';

Question: When was the outcome Runner-up with a score of 4–6, 3–6?
SQL: SELECT "Date" FROM "2-16306899-9" WHERE "Outcome" = 'Runner-up' AND "Score" = '4–6, 3–6';