Question: Which tournament included an opponent of Marinko Matosevic?
SQL: SELECT "Tournament" FROM "2-15271980-2" WHERE "Opponent" = 'Marinko Matosevic';

Question: Who was the opponent when the score was 6-3, 6-3?
SQL: SELECT "Opponent" FROM "2-15271980-2" WHERE "Score" = '6-3, 6-3';