SELECT COUNT(year) FROM table_name_42 WHERE location = "forest hills" AND runner_up = "john mcenroe" AND score = "6–3, 6–3"
Berapa tahun memiliki lokasi di Forest Hills dan skor 6-3, 6-3 untuk John McEnroe?
CREATE TABLE table_name_42 (year VARCHAR, score VARCHAR, location VARCHAR, runner_up VARCHAR)