CREATE TABLE table_24492 ("Week of" CLOB, "Tournament" CLOB, "Champion" CLOB, "Runner-up" CLOB, "Semifinalists" CLOB, "Quarterfinalists" CLOB)

How many weeks are shown for the champion of john mcenroe 6 2, 6 3?
SELECT COUNT("Week of") FROM table_24492 WHERE "Champion" = 'John McEnroe 6–2, 6–3'
SELECT COUNT("Week of") FROM "table_24492" WHERE "Champion" = 'John McEnroe 6–2, 6–3'