CREATE TABLE table_12794 ("Location" TEXT, "Year" FLOAT, "Champion" TEXT, "Runner-up" TEXT, "Score" TEXT)

When John Mcenroe won at Montreal, what was the score?
SELECT "Score" FROM table_12794 WHERE "Location" = 'montreal' AND "Champion" = 'john mcenroe'
SELECT "Score" FROM "table_12794" WHERE "Champion" = 'john mcenroe' AND "Location" = 'montreal'