CREATE TABLE table_30983 ("Outcome" TEXT, "Year" FLOAT, "Championship" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponent" TEXT, "Score" TEXT)

How many times has the score been 6 4, 3 6, [11 13]?
SELECT COUNT("Opponent") FROM table_30983 WHERE "Score" = '6–4, 3–6, [11–13]'
SELECT COUNT("Opponent") FROM "table_30983" WHERE "Score" = '6–4, 3–6, [11–13]'