CREATE TABLE table_79990 ("Outcome" TEXT, "Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Opponent" TEXT, "Score" TEXT)

What was the surface of the game that resulted in a final score of 6-1 7-5?
SELECT "Surface" FROM table_79990 WHERE "Score" = '6-1 7-5'
SELECT "Surface" FROM "table_79990" WHERE "Score" = '6-1 7-5'