Question: What is the tournament with a W/O score on November 5, 2007?
SQL: SELECT "Tournament" FROM "2-15209396-2" WHERE "Score" = 'W/O' AND "Date" = 'November 5, 2007';

Question: What is the surface of Eckental tournament with a W/O score?
SQL: SELECT "Surface" FROM "2-15209396-2" WHERE "Tournament" = 'Eckental' AND "Score" = 'W/O';

Question: What is the tournament with a Hard surface and Ruben de Kleijn as the opponent?
SQL: SELECT "Tournament" FROM "2-15209396-2" WHERE "Surface" = 'Hard' AND "Opponent" = 'Ruben de Kleijn';

Question: What is the score of the tournament on November 5, 2007 with a Carpet surface?
SQL: SELECT "Score" FROM "2-15209396-2" WHERE "Surface" = 'Carpet' AND "Date" = 'November 5, 2007';

Question: What is the surface of the tournament with Sascha Kloer as the opponent?
SQL: SELECT "Surface" FROM "2-15209396-2" WHERE "Opponent" = 'Sascha Kloer';